PU M 2026 Physical Optics Free Quiz 2

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PU M 2026 Physical Optics Free Quiz 2

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General 10 MCQs

11. What is special about the central maximum in single slit diffraction?

A. All maxima have equal width B. Central maximum is narrower C. Central maximum is twice as wide D. Central maximum is absent

12. What is the condition for the first minimum in single slit diffraction?

A. a sin θ = 0 B. a sin θ = 2λ C. a sin θ = 3λ D. a sin θ = λ

13. What is a diffraction grating?

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

14. Which type of waves can be polarized?

A. Longitudinal waves can be polarized B. Only transverse waves can be polarized C. All waves can be polarized D. No waves can be polarized

15. What device is used to produce polarized light?

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

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

A. I₀ B. I₀/4 C. I₀/8 D. I₀/2

17. What does Malus's law state?

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

18. 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

19. What is the formula for fringe width in Young's double slit experiment?

A. β = λd/D B. β = λD/d C. β = D/λd D. β = d/λD

20. How can the wavelength of light be calculated in Young's experiment?

A. λ = βD/d B. λ = βdD C. λ = dD/β D. λ = βd/D

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