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Expt. No.: POLARIMETER Date:

AIM: To determine the specific rotation of sugar solution using apolarimeter. Also determine the unknown concentration of the givensugar solution.

DIAGRAM:

OBSERVATIONS:

1. L.C. of polarimeter circular scale,

2. Length of Polarmeter tube, L = 21.5 cm

Measurement of rotation with concentration of solution.

Obs.

No.

Conc. Of SugarSoln.

Cin gm/cc

Polarimeter circularscale direct reading

xnin deg

Angle ofrotation

in deg

1. C0 = 0(Distilled Water)

x0 = 0=

2. C1 = 0.01 x1= 1=

3. C2 = 0.02 x2= 2=

4. C3 = 0.03 x3= 3=


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5. C4 = 0.04 x4= 4=

6. Cx = ? xx= x=

NATURE OF GRAPH:

CALCULATIONS:

Specific Rotation,

1. In CGS system

= ___________deg/cm/gm/cc

2. In S.I. system

= ___________rad/m/kg/m3

RESULTS:


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Specific rotation of sugar solution, S=

________________deg/cm/gm/cc

Specific rotation of sugar solution, S=

________________rad/m/kg/m3

Value of unknown concentration, Cx =

_________________gm/cc

Expt. No.: TURN TABLE Date:

AIM: Find the cardinal points and the equivalent focal length of thelens system. Draw diagrams to the scale and represent the cardinalpoints of the system.

DIAGRAM:

OBSERVATIONS:

1. Perpendicular distance between the two pins from the adjustmentof the axes,

X= _________cm2. The distance through

which lens system is tobe shifted from theintersection of the twoaxes,

X/2= _________cm

Diagram to represent

the cardinal points:

L1 ,L2 Lenses


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5/17

Expt. No.: R.P. OF TELESCOPEDate:

AIM: Determine resolving

power (R.P.) of telescope.Compare the two valuesof R.P. obtained. Take twodistances.

DIAGRAM:

AB- Objective lens

PP, QQ- Two distant objects

d - angle between two objects

M-Central Maxima due to PP

N- Central maxima due to QQ

Experimental Setup:


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OBSERVATIONS:

1. L.C. of the microscope,

2. Wavelength of the light used, = 5893

Measurement of grating element:

nth

wire

MicroscopeReadings

in cm

Width of 5elements

bin cm

Gratingelement

in cm

Mean d

in cm

1 x1= x1~ x2=

6 x2= x2~ x3=

11 x3= x3~ x4=

16 x4= x4~ x5=

21 x5= x5~ x6=26 x6= -- -- --

Measurement of slit width and R.P.:

1. L.C. of slit micrometer,


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2. Initial reading of slit micrometer when the slit is just closed, R0=

____________cm

Dist.bet.

Grating

&telesco

peD

in cm

Slit micrometer readingswhen vertical wires just Mean slit

width

in cm

Disappear Appear

R1in cm

Slitwidtha1= R1-

R0in cm

R2incm

Slitwidtha2= R2-

R0in cm

D1=

D2=Mean

(R.P.)1

Mean

(R.P.)2

RESULTS:

Expt. No.: R.P. OF PRISMDate:

AIM: Determine the resolving power of the given prism using mercury

source.

DIAGRAM:

Spectrometer:


8/17

Ray Diagram:

ABC- Prism P1- Line of wavelength

L- Lens P2- Line of wavelength +d

t- Length of prism base

OBSERVATIONS:

1. L.C. of the microscope,

2. Length of prism base, t= ________________cm

3. Wavelength of yellow doublet lines:

yellow I(Redside), 1= 5790

yellow II(Blueside), 2= 5770


9/17

4. Difference between wavelengths, d = 1-2 =_____________

5. Mean wavelength, = = _______________

I. Measurement of angle of prism:

II. Measurement of angle of min. deviation:

III. Measurement of width of auxiliary slit (with prism in min. div.

position):

1. L.C. of slit micrometer,

Telescope adjusted on Angle of prism

in deg

One face Another face

in deg in deg

Ver A

a1

in

deg

Ver B

b1

in

deg

Ver A

a2

in

deg

Ver B

b2

in deg

Telescope adjusted on Angle of prism

Mean

in deg

Yellow I Yellow II Direct

Vision

indeg

in deg in deg

VerAa1in

deg

VerBb1in

deg

Ver Aa2in

deg

VerBb2in

deg


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2. Initial reading of slit micrometer when the slit is just closed, R0=

____________cm

Slit micrometer readings when yellow linesjust

Mean slitwidth

in cm

merge as one get seperated

R1in cm

Slit widtha1= R1-R0

in cm

R2in cm

Slit widtha2= R2-R0

in cm

CALCULATIONS:

Angle of incidence,

R.P. of prism __________

RESULTS:

R.P. of prism= __________________

Expt. No.: HR DIAGRAMDate:

(ASSIGNMENT)


11/17

AIM: Draw the graph of absolute magnitude(M) versus spectral class and

compare the

graph obtained with the standard HR diagram. Also answer the

questions by

studying HR diagram.

TABLE:

I. The brightest stars.


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II. The nearest stars.


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NATURE OF GRAPH::


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HR DIAGRAM:

QUESTIONS:

Study the standard HR diagram and answer the following questions.

1. To which group ( e.g. main sequence or red giants would be anexample of a group) to the following stars belong? (this shouldinclude a colour as part of the answer)

a. Sunb. Procyon A

c. Atriad. YZ Ceti


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e. Luytens Star

2. Find an example (other than stars in question 3) for the followingcategories.

a. White dwarfb. Red main sequence starc. Red giantd. Yellow main sequence star

3. Which is the hottest star on the diagram?

4. Which is the coolest star on the diagram?

5. Which is the brightest star?

6. Which is the dimmest star?

7. What determines the colour of the star?

Expt. No.: BIPRISMDate:

AIM : Using the given biprism obtain distinct interference fringes and

determine wavelength of the given monochromatic source.

DIAGRAM:

Set Up:


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Operation:

OBSERVATIONS:

I. Measurement of the distance between the two virtual images

Obs.

No.

For magnified image For diminished imageLeft

virtualimage

x

in cm

Rightvirtualimage

y

in cm

Dist.

bet.

images

d1=x ~

Leftvirtualimage

x'

in cm

Rightvirtualimage

y'

in cm

Dist.

bet.

images

d2=x ~


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y

in cm

y

in cm

1.

2.

Distance between two virtual images,

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