PU CSS 2026 Geometrical Optics Free Quiz 2

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PU CSS 2026 Geometrical Optics Free Quiz 2

PU CSS Quiz

10:00

Answered: 0 / 10

Remaining: 10

Navigator 10 Q

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General 10 MCQs

11. What is the critical angle?

A. 0° B. 90° C. 45° D. 180°

12. What principle do optical fibers work on?

A. Refraction B. Reflection C. Total internal reflection D. Diffraction

13. Why does a diamond sparkle?

A. High refractive index causing total internal reflection B. Low refractive index C. Reflection from surface D. Refraction

14. Which lens converges light rays?

A. Convex lens B. Concave lens C. Plane lens D. Cylindrical lens

15. Which lens diverges light rays?

A. Convex lens B. Concave lens C. Plane lens D. Cylindrical lens

16. What is the lens formula?

A. 1/f = 1/u - 1/v B. 1/f = 1/u + 1/v C. 1/f = 1/v - 1/u D. 1/f = 1/u - 1/v

17. What is the power of a convex lens of focal length 0.5 m?

A. 2 D B. 0.5 D C. 5 D D. 10 D

18. What is the sign of power for a concave lens?

A. Positive power B. Negative power C. Zero power D. Infinite power

19. Which mirror converges light rays?

A. Concave mirror B. Convex mirror C. Plane mirror D. Parabolic mirror

20. Which mirror diverges light rays?

A. Concave mirror B. Convex mirror C. Plane mirror D. Parabolic mirror

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