# ADIKAVI NANNAYA UNIVERSITY PHYSICS III SEMESTER MODEL QUESTION PAPER WAVE OPTICS ( For Maths combination)-2017

CBCS / Semester System
PHYSICS
III SEMESTER
MODEL QUESTION PAPER
WAVE OPTICS
( For Maths combination)

Time:3 Hours                                                                          Max.marks:75
SECTION-A
5X5=25M

1.Explain astigmatism.

2.Explain the formation of colours in thin film.

3.Compare fresnel and fraunhofer classes of diffraction.

4.State and prove law of malus.

5.Write any five applications of Laser.

6. Calculate the focal length of lens of dispersive power 0.01 which should be placed in contact convex lens of focal length 84cm and dispersive power 0.021 to make the achromatic combination.

7. In Newton rings experiment the diameter of 10th dark ring is 0.433cm.Find the wavelength of incident light. If the radius of curvature is 70cm.

8. Calculate thickness of quarter wave plane given e
m =1.533, 1.544 0 m = and l =5000A0

SECTION-B

9. a) What is chromatic aberration. Derive condition for achromatism when the lenses are in contact.

(or)

b) Explain Spherical aberration with neat diagram. Describe eliminations of spherical aberration using to plano convex lenses separated by distance.

10. a) Describe Biprism experiment to produce interference fringes and determination of wavelengthof light.

(or)

b)Describe with theory of Newton rings experiment to determine wave length of onochromatic source of radiation.

11. a) Describe fraunhofer diffraction due to single slit.

(or)

b) What is Zone plate? Explain its construction and working.

12. a)Explain the construction and working of Nicol prism.

(or)

b)Give construction and working of Babinet's compensator. How it works to analyse elliptically polarised light.

13. a)Explain construction and working of Ruby laser length with neat diagram.

(or)

b)Explain the working He-Ne Laser with diagrams.

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