Q40. Which of the following statements are correct?
A. The angle at minimum deviation of a prism is

Q: What is the correct answer for CUET UG Physics Q40?

The correct answer is C. Let's analyze each statement: **A. The angle at minimum deviation of a prism is greater for violet light than that for red light.** This statement is correct. Due to dispersion, the refractive index of a prism material is higher for violet light than for red light (μ_violet > μ_red). Since the angle of deviation (δ) increases with the refractive index, violet light deviates more than red light. He

Q: Q40. Which of the following statements are correct? A. The angle at minimum deviation of a prism is greater for violet light than that for red light. B. The purpose of microscopes and telescopes is…

The correct answer is C. Let's analyze each statement: **A. The angle at minimum deviation of a prism is greater for violet light than that for red light.** This statement is correct. Due to dispersion, the refractive index of a prism material is higher for violet light than for red light (μ_violet > μ_red). Since the angle of deviation (δ) increases with the refractive index, violet light deviates more than red light. He

Q: What are the options for this CUET UG Physics question?

A. A, B, and C only · B. A, B, C, D only · C. A, B, C, E Only · D. B, C, D, E Only

Question

Q40. Which of the following statements are correct?
A. The angle at minimum deviation of a prism is greater for violet light than that for red light.
B. The purpose of microscopes and telescopes is to increase the visual angle.
C. For the diffraction to take place the size of aperture or of the obstacle should be comparable to the wavelength of light.
D. The light scattered in the direction of the incident light is always plane polarised.
E. The source and its virtual image can behave as a coherent sources.
Choose the correct answer from the options given below:
(a) A, B, and C only
(b) A, B, C, D only
(c) A, B, C, E Only
(d) B, C, D, E Only

FirstInTest · Accepted Answer

Let's analyze each statement:
**A. The angle at minimum deviation of a prism is greater for violet light than that for red light.** This statement is correct. Due to dispersion, the refractive index of a prism material is higher for violet light than for red light (μ_violet > μ_red). Since the angle of deviation (δ) increases with the refractive index, violet light deviates more than red light. Hence, the angle of minimum deviation (δ_m) for violet light is greater than for red light.
**B. The purpose of microscopes and telescopes is to increase the visual angle.** This statement is correct. Both optical instruments are designed to produce a magnified image, which means they increase the angle subtended by the image at the observer's eye (the visual angle) compared to the angle subtended by the object viewed directly.
**C. For the diffraction to take place the size of aperture or of the obstacle should be comparable to the wavelength of light.** This statement is correct. Diffraction, the bending of waves around obstacles or through apertures, is a significant and observable phenomenon only when the dimensions of the obstacle or aperture are of the same order of magnitude as the wavelength of the incident wave.
**D. The light scattered in the direction of the incident light is always plane polarised.** This statement is incorrect. While scattered light can be plane polarized, especially when viewed perpendicular to the direction of incident unpolarized light (e.g., in Rayleigh scattering), light scattered in the *direction* of the incident light (forward scattering) typically exhibits little to no polarization.
**E. The source and its virtual image can behave as a coherent sources.** This statement is correct. For two sources to be coherent, they must emit waves with a constant phase difference. If a real point source forms a virtual image (e.g., through a mirror or lens), the original source and its virtual image can indeed act as coherent sources because they originate from the same parent source, maintaining a constant phase relationship.
Therefore, statements A, B, C, and E are correct.

Answer

A, B, and C only

Answer

A, B, C, D only

Answer

A, B, C, E Only

Answer

B, C, D, E Only

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