chapter 18 powerpoint chapter review questions mrs. miller 6a light

Chapter 18

PowerPointChapterReview

Questions

Mrs. Miller6A

light

What do you “think”when you hear

the wordopaque?

???Answer???

NO WAY!

What do “think” when you hear

the wordtranslucent?

???Answer???

SOME!

What do “think” when you hear

the wordtransparent?

???Answer???

ALL!

Name threeKinds of mirrors.

???Answer???

planeconvexconcave

What carriesthe signals

generated by therods and cones *TO* your brain?

???Answer???

your optic nerve

Describe thelight that a laser

producesin ONE word.

???Answer???

coherent

What is thereason that a

laser beam can travel through a

curled-up optical fiber?

???Answer???

because oftotal internal reflection

What color woulda red tomato

appear under ablue light?

???Answer???

The tomato wouldappear black!

Name 3 things that can

occur whenlight strikesan object.

???Answer???

The light can be:• reflected• absorbed• transmitted

Clear glass, water, and

air are examples of what kind of

material?

???Answer???

transparent

What happenswhen light passes

from air intowater?

???Answer???

The lightSlows down

What happens when white light

strikes a black object?

???Answer???

no light isreflected

What is the hole through which

light entersthe eye?

???Answer???

Thepupil

What happenswhen parallel rays

of light hit asmooth surface?

???Answer???

regularreflection

What are theprimary colors of

LIGHT?

???Answer???

RedGreenBlue

Are frosted glassand wax paper:

transparenttranslucent or opaque?

???Answer???

translucent

Describe what ishappening if a

person isnearsighted.

???Answer???

•they don’t see well far away•their eyeballs are a little too long

Nearsightedness

What do we calllong, thin strandsof glass or plasticthat carry light for

long distanceswithout allowing the light to fade.

???Answer???

Optical fibers

What do we callthe transparent

front surfaceof the eye?

???Answer???

cornea

What do we callan image of adistant object

caused by refraction of light?

???Answer???

mirage

What device useslenses to focuslight rays and

record an imageof an object on

photographic film?

???Answer???

camera

Where are therods and cones

located?

???Answer???

On the retina

What occurs when parallelrays of lighthit a rough

or bumpy surface?

???Answer???

diffusereflection

What aresubstances called

that are usedto color

other materials?

???Answer???

pigments

What instrumentis used in

holography?

???Answer???

A laser

What do any twoprimary colors of light

combined inequal amounts

produce?

???Answer???

A secondary

color

Name a difference between the

refracting telescope and the

reflecting telescope.

???Answer???

Refracting telescope - uses lenses

Reflecting telescope - uses mirrors

This is located where the optic nerve

begins, and it is part of the retina.

What is it?

???Answer???

theblind spot

What is aninstrument called thatuses a combination

of lenses toproduce enlarged

images of tiny objects?

???Answer???

Amicroscope

What is it calledwhen the surface of a mirror curvesinward, like the

inside of a bowl?

???Answer???

concavemirror

What instrumentsuses lenses or mirrors

to collect andfocus light fromdistant objects?

???Answer???

telescopes

Because the lightrays never meet,a concave lens

can produce whatkind of image?

???Answer???

only avirtual image

What are thelight-sensitive

cells of the eye?

???Answer???

Rods and cones

What kind oflenses or mirrors

can usually be used to correct

farsightedness?

???Answer???

convex lenses

A photographicslide is an

example of what?

???Answer???

Color filter

What do we callthe bending oflight rays asthey enter

a new medium?

???Answer???

refraction

What do we calla curved piece of glass

or other transparentmaterial that is used

to refract light?

???Answer???

lens

Why are lasersuseful insurgery?

???Answer???

laser incisionsusually healfaster thanscalpel cuts

What shape is a lensthat is thinner inthe center thanat the edges?

???Answer???

concave

What do we callthe colored ring of

muscle that controlsthe size of the

pupil?

???Answer???

iris

What do we callthe bending of

light rays as theyenter a newmedium?

???Answer???

refraction

What helps the lensrelax or contract

when focusing onobjects nearby

or far away?

???Answer???

Ciliary muscles

_________________is formed wherelight rays meet

at a point.

???Answer???

A real image

A mirage is causedby ____________

as light passes throughlayers of airat different

________________.

???Answer???

refraction

temperatures

What is thecolored ring ofmuscle around

the pupil?

???Answer???

iris

A ________ lens isthicker

in the centerthan at its edges.

???Answer???

convex

To focus light, muscles in the eye

change the length andthickness of the____________.

???Answer???

lens

Nearby objectsappear blurry

to a personwho is

_____________.

???Answer???

farsightedness

What part of a your eye helps you

see in dim light?

???Answer???

The rods

What part of a telescope ormicroscope

magnifies theimage?

???Answer???

The eyepiece

What do we call light waves that are

in step, or havecrests aligned

with crests?

???Answer???

coherent

When the threeprimary colors of

PIGMENTS aremixed, what is theresulting color?

???Answer???

black

When you focuson a distant object,what does the lens

in your eye do?

???Answer???

The lens becomeslonger and thinner

What part of theeye functions onlyin bright light and

responds to color?

???Answer???

The cones

What do we callthe point at which

light raysmeet?

???Answer???

The focal point

What is ahologram?

???Answer???

a three-dimensional

photograph

How are signalssent through optical fibers?

???Answer???

The lasers convertelectrical signals

into pulses of light.

As parallel rays oflight pass through

a(n)_________ lens,they are bent toward

the center ofthe lens.

???Answer???

convex

Because ofrefraction, what do

glass prisms separatewhite light into?

???Answer???

a visiblespectrum of colors

What does aMaterial’s Index of

Refraction measure?

???Answer???

It measures how much a ray of light

BENDS when it enters that material.

________________occurs when

parallel rays of lighthit a bumpy,

or uneven,surface.

???Answer???

Diffuse reflection

What sciencechapters

will we coverthe last

Nine Weeks?

???Answer???

Chapter 19Chapter 20Chapter 13Chapter 14

It is A LOT of inkbut these slidesCAN be printedas flashcards!

??DID YOU KNOW??

What is a color filter?

???Answer???

It is a transparentmaterial that allows

certain colors oflight to pass

through it andreflects or absorbs

other colors.

What is the nameof the layer

of cells lining theinside of the

eyeball?

???Answer???

retina

Why is the whiteback and tail of a skunk

appear whiteand the legs look black?

???Answer???

White – reflects all colors of light

Black – absorbs all colors of light

Explain why a pencilin a glass of water

appears bentlooking at it

from the side!

???Answer???

Because the raysthat pass throughthe lens are bent

away from thecenter of the lensand spread out!

What is theWeb address

of your sciencetext Online?

???Answer???

www.phsuccessnet.com

Are you alsostudying from your comparison *chart*

of plane-concave-convexthat you made in class?

???Answer???

Yes!It is VERY HELPFUL!

What do you get if you overlapall the primary colors of light?

What do you get if you overlapall the primary colors of pigment?

???Answer???

White

Black

So, how does a television showthe color black?

???Answer???

The TV switchesoff all the coloredlights in the area

of the screenthat appears black!

What colors areused in thefour-color

printing process?

???Answer???

CyanYellowMagentaBlack

Another Web sitelinked to your

textbook iswww.phschool.com

???Answer???

www.phschool.comI like their HOT LINKS

And INTERNET ACTIVITIES

The End