B.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Optometry
GEOMETRICAL OPTICS
(2016 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. Define convergence of wave.
2. Give the Fermat's principle.
3. What is chromatic aberration?
4. Define wave length.
5. What is optical path length?
6. Define speed.
7. Define focal points.
8. Define light.
9. Give the refractive index of a medium.
10. Give the Law of refraction.
Sub. Code
14
CP-7925
2
Wk 3
Part B 5 25)
Answer all questions.
11. What is coma in lens aberration?
Or
Describe geometrical and optical path length of
rays.
12. Different types of lenses.
Or
Explain lateral and axial magnification.
13. Total internal reflection.
Or
Dual nature of light.
14. Explain principle points and principle planes.
Or
Theory of optical fibres.
15. Spherical aberration.
Or
Derive Vergence equation.
Part C x 10 30)
Answer all questions.
16. Explain refraction through a concave surface.
Or
Explain in detail the geometrical theory of light
propagation in optical fibers.
CP-7925
3
Wk 3
17. Explain the following in detail
Astigmatism,
Distortion.
Or
Derive the law of reflection based on fermat's
principle.
18. Dispersion of a prism.
Or
Derive the relation between for refraction at
concave surface.
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