prism and thin prism questions with solutions

Showing 1–10 of 110 questions

• MCQmediumGeometrical opticsprism and thin prism

  A 45° prism of refractive index 1.60 is immersed in liquid of index 1.20. A ray enters normally. At the second face:

  Options

  • Option A

    TIR occurs

  • Option B

    The ray just grazes

  • Option C

    The ray emerges

  • Option D

    No refraction occurs at first face

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• MCQmediumGeometrical opticsprism and thin prism

  A prism of angle 30° produces a miniμm deviation of 20°. Which value is closest to the refractive index of the prism?

  Options

  • Option A

    1.633

  • Option B

    1.783

  • Option C

    1.513

  • Option D

    1.933

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• A/RmediumGeometrical opticsprism and thin prism

  Evaluate the following Assertion and Reason.

  Assertion

  Assertion (A): Immersing a glass prism in a liquid of lower refractive index than glass reduces its miniμm deviation compared with air.

  Reason

  Reason (R): The refractive index of the prism relative to the surrounding medium becomes smaller.

  Options

  • Option A

    Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.

  • Option B

    Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.

  • Option C

    Assertion is true, but Reason is false.

  • Option D

    Assertion is false, but Reason is true.

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• Multi-correctmediumGeometrical opticsprism and thin prism

  For a prism, two incidence angles i₁ and i₂ produce the same deviation and correspond to the same reversible ray path. Select all correct statements.

  Select all that apply

  • Option A

    The emergence angle for i₁ can equal i₂

  • Option B

    The emergence angle for i₂ can equal i₁

  • Option C

    The two paths are related by reversibility

  • Option D

    The miniμm-deviation incidence lies between i₁ and i₂

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• MCQdifficultGeometrical opticsprism and thin prism

  A light ray is incident perpendicular to one face of a 90° prism and is totally internally reflected at the glass-air interface. If the angle of reflection is 45°, we conclude that the refractive index n :

  

  Options

  • Option A

    n < 1/√2

  • Option B

    n > √2

  • Option C

    n > 1/√2

  • Option D

    n < √2

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• MCQmediumGeometrical opticsprism and thin prism

  A 45°-45°-90° prism is used to turn a normally incident ray through 90° by TIR at the hypotenuse. Miniμm prism refractive index is:

  Options

  • Option A

    √2

  • Option B

    2

  • Option C

    √3

  • Option D

    4/3

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• MCQmediumGeometrical opticsprism and thin prism

  A 60° prism of refractive index 1.60 is immersed in a liquid of index 1.20. The critical angle at the prism-liquid interface is closest to:

  Options

  • Option A

    48.6°

  • Option B

    41.8°

  • Option C

    60°

  • Option D

    36.9°

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• MCQmediumGeometrical opticsprism and thin prism

  A prism is at miniμm deviation for yellow light. Which statement is necessarily true?

  Options

  • Option A

    Red and violet are also at their miniμm deviations

  • Option B

    Only the yellow ray has a symmetric internal path

  • Option C

    All colours have equal deviation

  • Option D

    All colours have equal refractive index

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• MatchmediumGeometrical opticsprism and thin prism

  Match each prism condition in List I with the corresponding relation in List II.

  List 1

  1. P. General prism path

  2. Q. Miniμm deviation

  3. R. Thin prism

  4. D. Normal entry through first face

  List 2

  1. 1. 1. δ=i+e-A

  2. 1. 2. r₁=r₂=A/2

  3. 1. 3. δ≈(μ-1)A

  4. 4. 4. Incidence at second face=A

  Options

  • Option A

    P-1, Q-2, R-3, S-4

  • Option B

    P-2, Q-1, R-4, S-3

  • Option C

    P-3, Q-2, R-1, S-4

  • Option D

    P-4, Q-3, R-2, S-1

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• MCQmediumGeometrical opticsprism and thin prism

  For the same prism data, the incidence angle at miniμm deviation is:

  Options

  • Option A

    50°

  • Option B

    55°

  • Option C

    60°

  • Option D

    65°

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