despersion of light ,despersive power and combination of prism questions with solutions

Showing 1–10 of 18 questions

• MCQmediumGeometrical opticsdespersion of light ,despersive power and combination of prism

  Two thin prisms of re$fractive$ indices 1.54 and 1.72 are arranged so that their deviations cancel. If the first prism angle is 4°, find the second prism angle.

  Options

  • Option A

    2°

  • Option B

    3°

  • Option C

    4°

  • Option D

    3.5°

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• MCQmediumGeometrical opticsdespersion of light ,despersive power and combination of prism

  The angle of prism is 5° and its refractive indices for red and violet colours are 1.5 and 1.6 respectively. The angular dispersion produced by the prism is : -

  Options

  • Option A

    7.75°

  • Option B

    5°

  • Option C

    0.5°

  • Option D

    0.17°

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• MatchmediumGeometrical opticsdespersion of light ,despersive power and combination of prism

  In List-I, four optical effects are mentioned. The physical phenomena of light which are essential to describe these optical effects are given in List-II. Choose the option which describes the correct match between the entries in List-I to those in List-II.

  List 1

  1. (P) Colorful sky in north polar region (Aurora Borealis)

  2. (Q) Partially polarized sun light

  3. (R) Rainbow

  4. (S) Dark and bright fringes

  5. .

  List 2

  1. (1) Dispersion and reflection

  2. (2) Total internal reflection

  3. (3) Diffraction

  4. (4) Scattering of light by molecules in the atmosphere

  5. (5) Emission of radiation from oxygen and nitrogen atoms excited by charged particles

  Options

  • Option A

    P→5, Q→4, R→1, S→3

  • Option B

    P→4, Q→2, R→1, S→3

  • Option C

    P→4, Q→1, R→2, S→3

  • Option D

    P→5, Q→4, R→1, S→2

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• MCQmediumGeometrical opticsdespersion of light ,despersive power and combination of prism

  Two thin prisms of flint glass, with refracting angles of 6° and 8° respectively, possess dispersive powers in the ratio :

  Options

  • Option A

    4 : 3

  • Option B

    3 : 4

  • Option C

    1 : 1

  • Option D

    9 : 16

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• MCQmediumGeometrical opticsdespersion of light ,despersive power and combination of prism

  A thin isosceles prism with angle 4° and refractive index 5/4 is placed inside a transparent tube with liquid (refractive index = 1.5) as shown. The deviation of light due to prism will be :-

  

  Options

  • Option A

    0.8° upward

  • Option B

    0.8° downward

  • Option C

    0.67° upward

  • Option D

    0.67° downward

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• MCQeasyGeometrical opticsdespersion of light ,despersive power and combination of prism

  A thin prism P₁ with an angle 6° and made of glass of refractive index 1.54 is combined with another prism P₂ made from glass of refractive index 1.72 to produce dispersion without average deviation. The angle of prism P₂ is:

  Options

  • Option A

    6°

  • Option B

    1.3°

  • Option C

    7.8°

  • Option D

    4.5°

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• MCQeasyGeometrical opticsdespersion of light ,despersive power and combination of prism

  When a beam of white light is allowed to pass through convex lens parallel to principal axis, the different colours of light converge at different point on the principle axis after refraction. This is called :

  Options

  • Option A

    Scattering

  • Option B

    Chromatic aberration

  • Option C

    Spherical aberration

  • Option D

    Polarisation

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• MCQeasyGeometrical opticsdespersion of light ,despersive power and combination of prism

  A thin prism with angle 5° of refractive index 1.72 is combined with another prism of refractive index 1.9 to produce dispersion without deviation. The angle of second prism is ______.

  Options

  • Option A

    4.5°

  • Option B

    6°

  • Option C

    4°

  • Option D

    5°

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• MCQmediumGeometrical opticsdespersion of light ,despersive power and combination of prism

  The dispersive powers of the materials of the two lenses are in the ratio 4 : 3. If the achromatic combination of these two lenses in contact is a convex lens of focal length 60 cm then the focal lengths of the component lenses are

  Options

  • Option A

    - 20 cm and 25 cm

  • Option B

    20 cm and - 25 cm

  • Option C

    - 15 cm and 40 cm

  • Option D

    15 cm and - 20 cm

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• MCQdifficultGeometrical opticsdespersion of light ,despersive power and combination of prism

  A flint glass convex lens of focal length 16 cm is placed in contact with crown glass lens. The refractive indices of crown glass for violet and red colour are μv = 1.525, μr = 1.515 and for flint glass μv' = 1.655 and μr' = 1.645. (a) Find the nature and focal length of the crown glass lens which will form an achromatic combination with the flint glass lens. (b) What is the focal length of the combination?

  Options

  • Option A

    f(crown) = + 20 cm; f(combination) = + 80 cm

  • Option B

    f(crown) = - 20 cm; f(combination) = - 80 cm

  • Option C

    f(crown) = - 80 cm; f(combination) = + 20 cm

  • Option D

    f(crown) = - 20 cm; f(combination) = + 80 cm, convergent achromatic lens

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