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1CHAPTER 5: LIGHT

5.1 REFLECTION OF LIGHT

1. Question 1: Johor 09Diagram 1 shows light rays pa

the principal axis directed to amirror.

Diagram 1

(a) Complete the sentence bticking (x) the correct bo

The light rays reflected by thewill :

Converge at a point F ......Diverge from a point F .....

(b) Complete the ray diagramDiagram 1 and mark ‘F’ onprincipla axis.

(c) What is the characteristimage formed by the miDiagram 1?

.........................................

rallel with

concave

elow by.mirror 

.......

[1 mark]n

the

[1 mark]

ics of rror in

.................[2 marks]

2. An object is plac,u from a concavtable shows theimage , when thevaried.

a. Name the light phen

involved to form thmirror.

 _________________ 

Objectdistance , u

 /cm

IChar 

10

20

30 Real, insize as t

40

b. Using the informatiodetermine the focal lmirror M.

 _________________ 

c. Give the reason for (b).

 _________________ 

d. Complete the table.e. An object is placed

cm from the concav(i) Draw a ray diagr 

below to show ththe image.

d at a distancemirror, M. The

haracteristics of distance u is

omenon that is

image by the

 ___________ 

agecteristics

erted, samehe object

n in the table,ength of the

 ___________ 

our answer in

 __________ 

t a distance 50mirror M.

m in the space

e formation of 

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3. Question 2: N9 08Diagram 1 shows the side mirrors of acar which helps the driver to seeobjects behind the car more effectively.

(a) State the type of mirror used.

.............................................................[1 mark]

(b) Give one reason why this type of mirror is used instead of a planemirror.

..............................................................[1 mark]

(c) In Diagram 2, F is the focal pointand C is the centre of curvature of aconvex mirror.

(i) Complete the ray diagram inDiagram 2 to show the positionof the image formed.

[ 2 marks]

(ii) State two characteristics of theimage formed.

.........................................................

.........................................................[2 marks]

4. Question 3: Kedah 07Diagram 3.1 shows a mirror at thecorner of a shop.

Diagram 3.1

(a) Name the type of mirror shown inDiagram 3.1.

...............................................................[1  m a r k  ]

(b) Name one characteristic of theimage formed by the mirror.

................................................................ [1  m a r k  ]

(c) Sketch a ray diagram to show howthe image is formed.

[3  m a r k s  ]

(d) What is the advantage of using thistype of mirror in the shop?

...............................................................[1  m a r k  ]

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5. Question 6: SBP Final FDiagram 6.1 and 6.2 show a viimage produced by a plane ma convex mirror respectively.

(a) What is meant by virtual i

..........................................

(b) Based on Diagram 6.1 an6.2,(i) compare the size of t

.....................................

(ii) state one other similaimage formed beside

....................................

(c) In Diagram 6.3, draw a rato show how the image in6.2 is formed.

4 08tual

irror and

mage?

.................[1  m a r k    ]

Diagram

he image

..................[1 mark]

rity of thevirtual.

..................

[1 mark]

diagramDiagram

[3 marks]

(d) Name the light phoccurs.

................................

(e) State one advantagconvex mirror as tha car.

..................................

6. Question 7: TrenDiagram 7.1 shows twotravelling in the opposi

passing through a shar is placed at X .

DIAGAM

(a) Diagram 7.2 showsray diagram when aplaced at X.

nomenon that

..........................[1mark]

of usingside mirror of 

.............................[1mark]

ganu 07cars, P and Q ,e directions,

p band. A mirror 

7.1

an incompleteplane mirror is

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DIAGRAM 7.2

(i) Complete the ray diaDiagram 7.2

(ii) State the light phenoinvolved in (a)(i).

...................................

(iii) Based on your answstate the problem ex

by the driver in car 

...................................

...................................

(b) Diagram 7.3 shows an inray diagram when a curvplaced at X to replace thmirror in Diagram 7.2. Th

mirror is used to overcoproblem that occur in (a)(

gram in

[2  m a r k s  ]

menon

.............[1  m a r k  ]

er in (a)(i),perienced

.

................

.................[1  m a r k  ]

completemirror isplanecurve

e theiii).

DIAGRAM

(i) Give the nammirror.

........................

(ii) Complete theDiagram 7.3

(iii) Based on you

how the curvthe problem i

........................

(c) The characteristicformed by the cur Figure 7.3 is dimiand upright.(i) What happe

characteristiwhen the focurved mirr 

.....................

7.3

of the curve

............................[1  m a r k  ]

ray diagram in

[2  m a r k s  ]

answer in b(ii),

mirror solvedn (a) (iii)?

............................[1  m a r k  ]

of the imageed mirror inished, virtual

to the

cs of the imageal length of ther is increased?

............................[1  m a r k  ]

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(ii) Give the reason for answer in (c)(i).

...................................

5.2REFRACTION OF LIGHT

7. Diagram 2 shows a lighpassing through a glas

(a) Name the phenomeno

.......................................

(b) Why does the phenom

occur.

.......................................

(c) What is the refraction

......................................

(d) Calculate the refractiv

the glass prism.

our 

.................[1  m a r k  ]

rayprism.

involved.

.................[1 mark]

non in (a)

.................[1 mark]

angle?

.................[1 mark]

index of 

[2 marks]

8. Question 3: MelaAn observer is lookingat the bottom of a glassas shown in Diagram3.the image of the coin issurface of the water.

(a) (i) State a characteDiagram 3.

..........................

(ii) Name the sciphenomenonobservation a

........................

(b) Explain why the iappears nearer tthe water.

.............................

.............................

a 07at a piece of coin

filled with water He found thatnearer to the

ristic of image in

.............................[1 mark]

ncenvolve in theove.

............................[1 mark]

mage of the cointhe surface of 

.............................

.............................[2 marks]

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(c) On Diagram 3, completdiagram from the coin tobserver’s eye.

9. Question 5: Trengganu

Diagram 5.1 and Diagram 5.2identical pencil is immersed idistilled water and sea water respectively.

(a) Based on Diagram 5.1 an5.2,

(i) compare the bendingpencil

.....................................

(ii) compare the densitywater and the sea wa

...................................

(iii) state the relationshithe density of water bending of the penci

...................................

(b) Based on Diagram 5.1, cthe size of the observedinside and outside the diwater 

...........................................

the raythe

[2 marks]

08

how anthe

Diagram

of the

.................[1  m a r k  ]

f distilleder 

.............[1  m a r k  ]

betweenith the

l

...............

[1  m a r k  ]mpareenciltilled

.............[1  m a r k  ]

(c) Name the phenomDiagram 5.1 and Di

................................

(d) Underline the corr 

bracket to complbelow.

Phenomenon in (dbecause of the chafrequency) of the li

(e) Diagram 5.3 shobeaker filled withIn Diagram 5.3 , dr 

from a coin to thethe image of the c

10.Question 5: SBPDiagram 5.1 shows a sta container filled withvertically down at an othe bottom of the conta

that the object appearshim than it really is.

The water in the contaireplaced with liquid Xthan water and the studhis experiment.

non shown inagram 5.2

........................[1  m a r k  ]

ct answer in the

te the sentence

happensnge in (velocity,ght.

[1  m a r k  ]

s a coin in aater.w a ray diagram

ye to show howin is formed.

08udent watchingater. He looks ject placed atiner. He notices

to be nearer to

er is thenhich is denser ents repeated

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He estimates the real and appdepth of the water and liquidrespectively and plots a graphexperimental results as showDiagram 5.2.

a. Based on Diagram 5.2, cthe gradient of the graph.

...........................................

b. Compare the refractive inwater and liquid X.

...........................................

c. Relate the density of liquirefractive index.

...........................................

d. Calculate refractive indeliquid X.

e. Name the phenomenon i

...........................................

f. What happen to the wavlight as it leaves the wate

...........................................

rent

using hisin

mpare

..................[1 mark]

dex of 

..................[1 mark]

d with the

..................[1 mark]

of the

[2 marks]volve.

..................[1 mark]

length of r?

..................[1 mark]

g. If the student repeexperiment aboveblock, instead of the size of the imathe glass block toDiagram 5.1

................................

................................

11.Question 5: KedaDiagram 5.1 shows a raentering from air into wDiagram 5.2 shows a raentering from air into gl

(a) (i) Compare the spwater with the sair.

.............................

ted thesing a glass

ater, comparee seeing from

hat of water in

.............................

.............................[1 mark]

h 09y of lightater.y of lightass.

eed of light ineed of light in

..........................[1 mark]

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(ii) Compare the speed of light inglass with the speed of light inair.

..........................................................[1 mark]

(iii) State the relationship betweenthe speed of light in a mediumand the direction of bending of light in that medium.

......................................................[1 mark]

(iv) Name the phenomenon shownin Diagram 5.1 and Diagram 5.2

......................................................[1 mark]

(b) Diagram 5.3 shows a point P at thebottom of a swimming pool appearsto be at the point Q to the observer.(i) complete Diagram 5.3 by

drawing light rays to show how

the image of the point P is seenat Q.

[2 marks](ii) Calculate the refractive index of 

the water in the swimming pool.[2 marks]

5.3 TOTAL INTERNAL REFLECTION

12.Question 4: MARA 09Diagram 4.1 shows a light ray incidentinto a glass block.

(e) (i) Based on Diagram 4.1, the angle

of 42˚ is known as ........................[1 mark]

(ii) Calculate the refractive indexfor the glass block.

[2 marks]

(b) The light ray is adjusted so that theangle at M is now 48˚, as shown inDiagram 4.2.

(i) On Diagram 4.2, complete thepathway for the light ray.

[1 mark](ii) Explain your answer in 4(b)(i).

...................................................[1 mark]

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(c) Diagram 4.3 shows a ligpropagating into a glas(i) On Diagram 4.3, co

propagation of the l

(ii) What happens to threfraction if a densblock is used?

..................................

13.Question 4: TrengganuDiagram 4.1 shows a ray of ligfrom air to water.

Diagram 4.2 shows a ray of ligfrom air to a thick glass block.The refractive index of water ais 1.33 and 1.50 respectively

(a) What is meant by refractiv

..................................................

(b) In Diagram 4.1, the ray in tbent toward normal atangle.

ht rablock.plete the

ight ray.[1 mark]

angle of r glass

.................[1 mark]

07ht travels

ht travels

nd glass

index?

...................

[1  m a r k  ]e water isa certain

(i) In the glass blocdraw the refracte

(ii) Why the angle indifferent from the

...............................

...............................

(c) Diagram 4.3 showsa carefully cut facesdiamond its sparkle.Diagram 4.4 showsinto the diamond

(i) Complete the ray[ 1  m 

(ii) Give one reason fo(c) (i).

.................................

.................................

(d) If the refractive inis 2.40 calculate ththe diamond.

in Diagram 4.2,ray.

[1  m a r k    ]he glass blockswater.

............................

............................[ 1  m a r k    ]

diamond withand give the

ntering light

in Diagram 4.4.r k   ]

r your answer in

.............................

.............................[ 1  m a r k    ]

ex of a diamondcritical angle of 

[2  m a r k s  ]

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14.Figure 5 shows two glawith right angle are beia binocular.

(i) On the diagram, compllight ray until it reachesobserver.

(ii) State the characteristicimage in a binocular.

 ______________________ 

(iii)Give advantages of usibinocular instead of a t

 ______________________ 

 ______________________ 

15.Question 2: Johor 08Diagram 2.1 shows a driver thdriving under a hot sun, seeswater appearing on the roadthe pool of water disappears aapproaches it.

Diagram 2.1

s prismsg used in

te thethe

of the

 ______ 

g alescope.

 ______ 

 ______ 

t ispool of 

head, buts the car 

(a) Name this naturaas observed by t

.............................

(b) State the physics

involved in this p

.............................

(c) (i) How is the deair compare tthe warm air?

........................

(ii) When light rafrom a den

less dense mhappen to threfracted rays

........................

(iii) Complete Diashow the for natural phenshown in Dia

Diagram

l phenomenone driver.

.............................[1 mark]

concept that is

henomenon.

.............................[1 mark]

sity of the coolthe density of 

............................[1 mark]

s propagateser medium to adium, state whatdirection of the

.

............................[1 mark]

gram 2.2 toation of the

menon asgram 2.1.

.2

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16.Figure 6 shows an opticconsists of two layersmade of material P andQ are of different opticadensities.

a. Name the light phobserved in optic

..............................................

b. Which material

(i) is optically denser?

 ____________________ 

(ii) Has a higher refractive i

 ____________________ 

(c) The refractive index of in Y is 2.10. Calculate the cangle of the inner core Y

[

(d) State one use of optical(i) medical field

 ______________________ 

(ii)communication

 ______________________ 

al fibre. Ithich are

Q. P andl

enomenaal fibre.

.................

 _____ 

ndex?

 _____ 

ner coreritical

2  m a r k s    ]

ibre in

 ______ 

 _____ 

5.4 LENSES

17.Figure 1.1 showsplaced in front of 

(i) Draw a ray diagr formation of imaby the lens.

(ii) State three charaimage formed by

(b) Figure 7.2 shows anin front of a concav

(i) Draw a ray diagr formation of imaby the lens.

(ii) State three charaimage formed by

lens.

 _________________ 

an object Xa convex lens.

m to show thee of the object X

cteristics of thethe convex lens.

object Y placedlens.

m to show thee of the object Y

cteristics of thethe concave

 _______ 

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18.Figure 2 shows two par rays enter a convex lenconverge at the other silens.

Figure 2

(a) Where is position of the o

 ______________________ 

(b) State three characteristics

image formed by the lens.

 ______________________ 

(c) What is the focal length of 

(d) An object with a height of placed at a distance 15 cof the lens. Find

(i) object distance

(ii) height of the image

(iii) characteristics of the i

 ___________________ 

Iv) A light bulb is put in fr lens. Parallel light rafrom the lens. Whereposition of the light b

 ______________________ 

llel lightand then

de of the

 ject?

 _ 

of the

 _ 

the lens?

4 cm isin front

mage

 __ 

nt of thes emergeis thelb?

 _ 

19.Question 2: SBPDiagram 2 shows an obfront of a convex lens oaxis. F is the focal poin

(a) What is meant b

.............................

(b) Using the infor 2,calculate the i

(c) (i) Complete thedetermine the

image form.

(ii) State the chaimage form.

.......................

08 ject is placed inn the principal

of the lens.

focal length?

.............................[1 mark]

ation in diagramage distance.

[2 marks]

iagram 1 toposition of 

[1 mark]

racteristic of the

.............................

[1 mark]

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20.Figure 3 shows a convex lenswhich has a focal length of 15.0cm. An object is placed at adistance 20 cm in front of thelens.

Figure 3

(a) (i) complete the ray diagram.Determine the position of theimage.

(ii)State the characteristics of theimage.

 _______________________ 

(b) Calculate the image distance.

(c) Find linear magnification of theimage.

(d) The convex lens is replaced by a

concave lens which also has afocal length of 15 cm. State anychanges in the characteristics of the image formed by the concavelens.

 ___________________________ 

21.Question 6: Mid Melaka 09Diagram 6.1 and Diagram 6.2 show lightrays from two identical objects passingthrough the convex lenses, M and N.Both of the lenses produce virtualimages. F is the focal point of each lens.

Diagram 6.1

Diagram 6.2

(a) What is meant by virtual image?

……………………………………………[1 mark]

(b) Observe Diagram 6.1 and Diagram6.2. State the difference between:(i) size of image produced by the

lenses.

……………………………………..[1 mark]

(ii) the object distance ,u.

....................................................[1 mark]

(i i i)     the image distance , v.

……………………………………..[1 mark]

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(c) State the relationship betwimage size and the imageof the lens

..............................................

(d) Based on the answers in 66(c), write an equation to srelationship between themagnification of the imageobject distance, u and the idistance, v.

………………………………

(e) Half of lens M in Diagramcovered with a piece of bl

(i) What happen to the imageby lens M.

………………………………

(ii) Explain your answer in 6 (

………………………………

22.Question 8: Kelantan 08Diagram 8 shows an object, Oheight 2 cm placed on the leftconvex lens X. The focal lengconvex lens is 10 cm.

(a) In Diagram 8 draw the rafrom the object to form an

een theistance

.................[1 mark]

(b) andow the

m ,mage

…………..[1 mark]

6.1 isck paper.

produced

…………[1  m a r k  ]

) (i).

…………[1  m a r k  ]

withside of ah of the

pathimage.[2 marks]

(b) State the characteriimage formed.

.................................

(c) If the object is plac30 cm from the len(i) The image di

(ii) Linear magni

(d) You are given anot

 Y with focal lengthrequired to create aastronomical telescconvex lenses X an(i) Which lens i

objective len

Objective len

Eyepiece len

(ii) Give one reaanswer in (d)

………………

(e) Draw the arrangelenses and sketcfrom distance obconvex lenses Xsimple astronom

stics of the

...........................[1 mark]

d at a distance, calculate:tance

[2 marks]fication

[1 mark]

er convex lens,

0 cm. You aresimpleope usingd Y.

suitable to beand eyepiece?

s:…………….

: ……………[2 marks]

on to your i)

………………….[1 mark]

ment of thethe ray path

ect usingand Y to form acal telescope.

[3 marks]

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23.Conceptual: Kelantan 0Diagram 9.2 and Diagram 9.3rectangular glass blocks withoptical density and refractive iRay of light is directed towardblocks with the same angle of 

30˚.

Based on Diagram 9.2 and 9.3(i) Compare the densiti

glass blocks.(ii) Compare the refracti

of the glass blocks.(iii) Compare the angle o

refraction of the glas(iv) Relate the angle of r 

r and the density of tblocks.

(v) Relate the angle of r r and the refractive ithe glass blocks.

how twodifferentndex.the glassincidence

s of the

ve index

f s blocks.fraction,

he glass

fraction,dex of 

[5 marks]

24.Conceptual : Per Diagram 9.1 shows a raenter a rectangular glaDiagram 9.2 the light r at right angle. Both thelight ray to change its d

Diagram

Diagram

(i) Name the phe

(ii) With referencand 9.2 compthe rays in boRelate all thediagram 9.2 torelationship

index of theState one conabove pheno

k 07y of light rays block andy enter a prismblock cause theirection.

.1

.2

nomena?[ 1 mark]

to diagram 9.1re the angles of h blocks .ngles inshow the

ith refractive

lass block.ition for theena to occur.

[5 marks]

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25.Conceptual: Johor 08Diagram 9.1 and Diagram 9.2transparent block made of awith a different refractive inderay travel in both blocks withincident angle,  i .

(i) What is meant by a refractindex?

(ii) Using Diagram 9.1 and Dicompare the refractivrefraction angle and critbetween the two blocks.Base on Diagram 9.1 an9.2, relate the refractive icritical angle.

26.Conceptual: Melaka 08Diagram 9.1 and Diagram 9.2

parallel light rays passing thr convex lenses J and K. F is tprinciple focus and O is the ocentre .

(i) What is meant by principle

(ii) Based on Diagrams 9.1 ancompare the thickness of tlenses J and K and the eff refracted light rays. State

show aaterial

x. A lighthe same

ive

[1 mark]

agram 9.2,e index,ical angle

Diagramndex with

[5 marks]

how

ughetical

focus ?[1 mark]

9.2 ,e convexct on the

he

relationship betweeof the lens and the f 

27.Conceptual: MelDiagram 10.1 and Diagr light rays from two ide

passing through a consituations produce realfocal point for the conv

(i) What is meant by re

(ii) Based on Diagram 110.2, compare the othe image distanceimage. Relate the siwith the image distadeduction regardingbetween the objectsize of the image.

the thicknesscal length.

[5 marks]ka 08am 10.2 showtical objects

ex lens.Bothimages. F is thex lens

l image?

[1  m a r k  ]

0.1 and Diagram ject distance,nd the size of e of the image

nce to make athe relationshipistance and the

[5  m a r k s  ]

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28.Conceptual: SBP 08A student used a slide projectthe image from the slide.When the slide is place nearer lens the sharp image form onscreen as shown in Diagram 9

When the slide is place furthelens the sharp image form onscreen as shown in Diagram 9

Based on Diagram 9.1 and Diacompare the object distance,distance and size of image thon the screen.

Relate the object distance to tdistance and the object distansize of image that formed on t

[  5 m 

29.Understanding: SBP 08Diagram 10.3 shows a dentistmirror to examine a tooth of a

Diagram 10.3

or to view

to thehe

.1.

from thehe.2.

gram 9.2,he imaget formed

e imagece to the

e screen.arks   ]

used apatient.

(i) State the type of dentist.

(ii) Draw the ray diagcharacteristic of i

dentist.

30.Understanding:Describe how you estilength of a convex lens

31.Understanding:

Diagram 9.1 shows a radirected perpendicularlsemi circular glass blopasses through the glapoint O before leaving tThe angle of incidenceblock is 30˚.

(a) What is meant bincidence?

(b) Explain how totalreflection occursabove.

irror used by the

[1 mark]

ram to show theage seen by the

[3 marks]

elaka 08ate the focal

.

[4  m a r k s  ]

elantan 08

y of lightat a side of thek. The rays block to a

he glass block.in the glass

angle of 

[1 mark]internalin Diagram 9.1

[4 marks]

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32. Understanding: Johor (i) State two conditions under 

light ray would undergo toreflection.

(ii) Diagram 9.3 shows a liincident on a piece of Cr of critical angle 42°.Draw the light ray to showemerging from the Crown

33.Understanding: SBP 08

While driving a car on a hot dmay see a mirage on the road.how mirage occurred.

[  4 m 

34.Understanding: Perak 0Explain why a fish in a pond aobjects around him although tobstacles.

8which

al internal

[2 marks]

ht ray iswn Glass

how a raylass[2 marks]

y, youExplain

arks   ]

7ble to seehere are

[4 marks]

35.Understanding:With the help of a diagr working principle of an

36.Understanding:

Figure 11.1 shows the tof a car driver, the car’the front of a lorry whicthe car.

(i) Name the type of mside mirror in Figur 

(ii) Explain why the mi11.1 is used instea

of mirror.

(iii) The focal length of in Figure 11.1 is 5 cwith a height of 3 cin front of the mirroof 1:1, draw a ray dihow the image of tformed.

edah 07am, explain theoptical fibre.

[4  m a r k s  ]

RSM 07

op view positionside mirror and

h is overtaking

irror used for the11.1.

[1 mark]

ror in Figureof other types

[3 marks]

he side mirror m. An object

is placed 6 cmr. Using a scaleagram to showe object is

[2 marks]

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37.Understanding: Johor 0Diagram 11.1 and Diagram 11.two incomplete periscopes RPeriscope R uses two planereflect the light.Periscope S uses two prisms

total internal reflection of ligh

(a) Which periscope produceimage? Give a reason for choice.

(b) Complete the diagrams beshow the positions of the

mirrors in periscope R anprisms in periscope S.Draw the ray diagram to sreflection of light in periscand S.State a condition that enainternal reflection of lightprism of the periscope S.

72 shows

nd S.irrors to

to enable

.

clearer our 

[2  m a r k s  ]

low toplane

the

ow theopes R

le totaln the

38.Qualitative probl You are given two rightto build a periscope.

(i) Explain howbuild a simple[6 marks ]

(ii) Suggest modimade to convto binoculars

39.Qualitative problDiagram 9.4 shows thoptical fibretelecommunications.

Optical fibres are mad

of glass. Each singlecore) is coated withanother type of  cladding).You are requisuggestions in desigfibre which can carry mExplain your suggestifollowing aspects:

[5  m a r k s  ]

m: Perak 07angles prisms

ou are going toperiscope

fication to bert the periscope

[ 4 marks ]

m: Johor 08structure of an

used in

of fine strands

lass fibre (inner a thin layer of 

glass (outer red to give some

ing an opticalore information.ns base on the

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(i) refractive index of theouter glass

(ii) the properties of materiaoptical fibre

(iii) the thickness of the glass

40.Qualitative problem: SBDiagram 9.5 shows a simpleastronomical telescope.

By using two prism and a teleDiagram 9.5, suggest modificcan be done to make a binocu

In your explanation,

(i )    draw the arrangement of thand lenses draw ray diagraexplain how the image for 

(ii)  state two advantages usinbinocular compared to telewhen observing far objectground.

[  1 0 

41.Qualitative problem: Me You are given two convex len

S, with focal lengths of 40 cmrespectively. Both the lenseto build a compound microsc

(i) Using the two lenses, exyou would build amicroscope.

inner and

l used for 

[10 marks]

P 08

cope intion thatlar.

e prismsm to

scopen the

arks   ]

laka 08es, R and

and 10 cmare used

pe.

plain howompound

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(ii) Suggest a suitablemodify the microsc(c)(i) to produce bri

(iii) Suggest and explai

produce a bigger imcompound microsc

42.Making Decision:Diagram 11.3, 11.4 andreflection of light by thr mirrors

As a scout, you intendcooker that can be useusing direct sun light.Diagram 11.6 shows thdesign of the solar coo

(a) Choose the mostin Diagram11.6 twater in the shor explain the suitadesign.

optical device toope you built inhter image.

[2  m a r k s  ]

a method to

age in thepe.[2  m a r k s  ]

Johor 0711.5 show theee types of 

o design a solar to boil water 

ee differenter.

suitable designat can boiledest time andility of the

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(b) Suggest and explain twimprove the design you(a ).

(c) Give two reasons why tsolar cooker is said to

environmental friendly?

(d) Give two reasons why tenergy is not widely us

[

43.Making Decision: KedaTable 11.1 shows 5 materials

be used to make an optical fib

(i) Write an equation for findi

refractive index of a materiof velocity of light?

(ii) You are asked to inthe characteristics of thmaterials in Table 11.1could be used to makefibre.Explain the suitability o

characteristic and hencdetermine the most suitmaterial to be used tooptical fibre.Give a reason for your 

ways tochose in

e abovee

e solar d?

10  m a r k s  ]

07hich can

re.

g the

al in term

[1  m a r k  ]

estigatee

hichhe optical

each

,ableake the

hoice.

[10  m a r k s  ]

44.Making Decision: You are asked to investfeatures of optical fibreof an endoscope for mFigure 11.2 below shooptical fibre.

P QRefractiveindex of Outer core

1.5 1.6

RefractiveIndex of Inner Core

1.6 1.5

Flexibility   High Lo

Diameter of fibre(mm)

1.00 1.0

(i) Based on the Tablethe suitable featurefibres and then detsuitable optical fibr used to design theGive reasons for yo

(ii) Figure 11.3 showsAt the two ends of are two lenses. Oobjective lens, thepiece.

MRSM 07igate thes for the designdical imaging.s the parts of an

R S

1.5 1.6

1.6 1.5

High low

0.01 0.01

above, explains of the opticalrmine the most

that can bendoscope.

ur choice.[8 marks]

n endoscope.the endoscopee is theother is the eye

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FIZIKMOZAC2010

State the function of the t

45.Quantitative problem:An object is placed 30 cm froconvex lens of focal length 10

(i) Calculate the image

(ii) Calculate the linear magnification for th

46.Quantitative problem: KDiagram 11.1 shows a coin atbottom of a tall empty cup.Diagram 11.2 shows the coinbottom of the cup when the cwith water 

Diagram 11.1 Di

(i) Compare the size of the coDiagram 11.1 and Diagram

seen by an observer aboveState the phenomenon thathe difference in size of thseen in Diagram 11.1 and11.2.

o lenses.[2 marks]

RSM 07a

cm.

istance

image.[5 marks]edah 07he

t thep is filled

gram 11.2

in in11.2, as

the cup.causedcoin iniagram

[2  m a r k s  ]

(ii) The depth of water i16 cm. Calculate theof the coin when viefrom above by the o

[Refractive index

(iii) Suggest one metmake the coin apobserver than in (

47.Section B: KelanDiagram 9.1 and Diagraparallel rays are directelenses P and Q with foc

(a) What is meant by fo

Diagram 11.2 isapparent depth

ed directlyserver.

of water =3

4]

[2  m a r k s  ]od that willear nearer to the)(i).

[1  m a r k  ]

an 09m 9.2 showd towards theal point F.

cal point?[1 mark]

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(b) Using Diagram 9.1 and Dicompare the thickness, thlength and power of the leRelate the thickness of ththe focal length to make adeduction regarding the

relationship between thicthe lens and the power of 

(c) Diagram 9.3 shows lensas a magnifying glass.

(i) At which position thshould be placed soP will acts as a magglass?

(ii) Draw a ray diagram t

the formation of imaby lens P in Diagram

(d) Diagram 9.4 shows a comicroscope

gram 9.2,e focalns.

lens with

ness of lens.[5 marks]

P is used

objectthat lensifying

o show

e formed9.3[4 marks]

pound

Using an appropriate psuggest and explain sumodifications or ways tmicroscope to increaseand to form a brighter a

 Your modification can

on the following aspect

-   The selection of llens and as an e

-   The position of t-   The position of t-   The distance bet

objective lens an-   Condition of the

the microscope.

48.Section B: MelakDiagram 9.1 and Diagr rays travel from glassincidence rays travelare at different angle. Tof the glass is 420.

ysics concept,itableo enable theits efficiency

nd clear image.e emphasized

s:

ens as objectiveepiecee objecte eyepiece lenseen the

d eyepiecelace to store

[10 marks]

09m 9.2 show lighto air. Thed into the glasse critical angle

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(a) (i) What is meant by critical angle?

[ 1  m a r k    ]

(ii) Using Diagram 9.1 and Diagram 9.2,compare the size of the incidentangles and the effect of theseincident angles towards thepropagation of light rays produced.Relate the size of the angle with thecritical angle to make a deductionregarding the relationship todeduce a relevant physics concept.

[5  m a r k s    ]

(b) It is known that the sky is redduring sunset and theformation of rainbow on the skyalways appeared after raining.Explain these phenomena.

[4 marks ]

(c) You are given two type of glasswith different refractive index .

Both glasses are used to build anoptical fiber. The structure of thisoptical fiber is shown on Diagram9.2.

Diagram 9.2

(i) By combining the two types of glasses, explain how you aregoing to build the optical fiber in telecommunication anddescribe the working principleof the optical fiber.

[6  m a r k s  ]

(ii) Suggest modification that needsto be done so that your opticalfiber can be use in an endoscopefor medical imaging. Your modification should base on thefeatures of the optical fiber andthe flexibility of the fiber optic.

[4  m a r k s  ]