PU CSS 2026 Physical Optics Free Quiz 2

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PU CSS 2026 Physical Optics Free Quiz 2

PU CSS Quiz

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General 10 MCQs

11. What is a diffraction grating?

A. Many parallel slits B. A single slit C. A lens D. A mirror

12. What is polarization?

A. Restriction of wave vibrations to a single plane B. Spreading of waves C. Bending of waves D. Superposition of waves

13. What device is used to produce polarized light?

A. Lens B. Mirror C. Polarizer D. Prism

14. When unpolarized light passes through a polarizer, what is the transmitted intensity?

A. I₀ B. I₀/4 C. I₀/8 D. I₀/2

15. What does Malus's law state?

A. I = I₀ cos²θ B. I = I₀ sin²θ C. I = I₀ cos θ D. I = I₀ tan θ

16. What did Young's double slit experiment demonstrate?

A. Wave nature of light B. Particle nature of light C. Both wave and particle nature D. Neither wave nor particle

17. What is the intensity pattern in Young's double slit experiment?

A. All fringes have equal intensity B. Bright fringes have minimum intensity C. Bright fringes have maximum intensity D. Dark fringes have maximum intensity

18. What is observed when white light is used in Young's double slit experiment?

A. Central fringe is white B. Central fringe is colored C. All fringes are white D. No pattern is formed

19. What does Huygens' principle state?

A. Every point on a wavefront acts as a source of secondary wavelets B. Waves travel in straight lines C. Waves are particles D. Waves have constant speed

20. What are coherent sources?

A. Sources with random phase difference B. Sources with constant phase difference C. Sources with different frequencies D. Sources with different wavelengths

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