prism and thin prism questions with solutions

Showing 1–10 of 18 questions

• MCQmediumGeometrical opticsprism and thin prism

  For refraction through a prism at minimum deviation, consider the statements: (A) the refracted ray inside the prism becomes parallel to the base; (B) a larger prism angle necessarily gives a smaller minimum deviation; (C) angle of incidence equals angle of emergence; (D) except at the minimum-deviation setting, there are generally two incidence angles giving the same deviation; (E) the angle of refraction becomes double the prism angle. Choose the correct set.

  Options

  • Option A

    B, C and D only

  • Option B

    A, B and E only

  • Option C

    A, C and D only

  • Option D

    B, D and E only

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• IntegereasyGeometrical opticsprism and thin prism

  A ray of light suffers minimum deviation in a prism of angle 60°. The refractive index of the prism material is √2. Find the angle of incidence in degrees.

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• MCQmediumGeometrical opticsprism and thin prism

  The exit surface of a prism with refractive index n is coated with a material having refractive index n/2. When this prism is set for minimum angle of deviation it exactly meets the condition of critical angle. The prism angle is____

  Options

  • Option A

    60°

  • Option B

    15°

  • Option C

    30°

  • Option D

    45°

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• MCQmediumGeometrical opticsprism and thin prism

  An equilateral prism of refractive index 1.6 has one face coated with a transparent material of refractive index n₂, as shown in the figure. The ray inside the prism strikes the coated face at an incidence angle of 60°. What is the maximum value of n₂ for which total internal reflection at the coated face is just possible?

  

  Options

  • Option A

    3√3 / 1.6

  • Option B

    √3

  • Option C

    3.2 / √3

  • Option D

    4√3 / 5

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• Multi-correctmediumGeometrical opticsprism and thin prism

  A prism of angle 75° and refractive index √3 is coated with thin film of refractive index 1.5 only at the back exit surface. To have total internal reflection at the back exit surface the incident angle must be _______.

  (sin 15° = 0.25 and sin 25° = 0.43)

  Select all that apply

  • Option A

    between 15° and 20°

  • Option B

    15°

  • Option C

    > 25°

  • Option D

    < 15°

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• MCQmediumGeometrical opticsprism and thin prism

  As shown in the diagram, when the incident ray is parallel to base of the prism, the emergent ray grazes along the second surface.

  If refractive index of the material of prism is √2, the angle θ of prism is.

  

  Options

  • Option A

    60°

  • Option B

    75°

  • Option C

    90°

  • Option D

    45°

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  JEE Mains 202621 January Evening Shift

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• NumericmediumGeometrical opticsprism and thin prism

  The refractive index of prism is μ = √3 and the ratio of the angle of minimum deviation to the angle of prism is one. The value of angle of prism is _________°.

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  JEE Mains 2024 06 Apr Morning Shift

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• MCQmediumGeometrical opticsprism and thin prism

  The refractive index of a prism with apex angle A is cot(A/2). The angle of minimum deviation is:

  Options

  • Option A

    δₘ = 180° - A

  • Option B

    δₘ = 180° - 3A

  • Option C

    δₘ = 180° - 4A

  • Option D

    δₘ = 180° - 2A

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• IntegermediumGeometrical opticsprism and thin prism

  A transparent liquid of refractive index √2 fills an equilateral hollow prism. Find the angle of minimum deviation, in degrees.

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  15 April 2023 Morning Shift

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• Multi-correctdifficultGeometrical opticsprism and thin prism

  Consider two isosceles prisms 1 and 2 with prism angles A₁ and A₂ and refractive indices n₁ and n₂, respectively, as shown in the figure. The faces a₁b₁ and a₂b₂ are parallel to each other and perpendicular to the mirror M. If a ray of light is incident on the face a₁c₁ and emerges from the face a₂c₂, then the correct statement(s) is/are:

  

  Select all that apply

  • Option A

    If both the prisms are at minimum deviation condition, then n₂/n₁ = sin(A₁/2)/sin(A₂/2).

  • Option B

    If prism 2 is at minimum deviation condition, then sin i₁ = n₂ sin(A₂/2) is always true.

  • Option C

    If both prisms 1 and 2 are thin and are at minimum deviation condition with angles of deviation δ(min,1) and δ(min,2), respectively, then θ = δ(min,1)/[2(n₁-1)] + δ(min,2)/[2(n₂-1)].

  • Option D

    If prism 1 is at minimum deviation condition, then sin i₂ = n₁ sin(A₁/2) is always true.

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  JEE Advanced2026Paper 2

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