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Dispersion of Light

Four students...

Question

Four students studied refraction of light through a glass prism. They traced the ray of light and measured the angle of incidence 'i' and angle of deviation $δ$ as shown in figures 1,2,3 and 4. Which one is the correct representation?

A

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B

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C

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D

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Solution

The correct option is A
We know that angle of deviation is the angle between the initial incident ray and the final emergent ray after refraction. Therefore, in this case figure (a) represents the correct angle of deviation.

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After tracing the path of a ray of light through a glass prism a student marked the angle of incidence ( $∠$ i), angle of refraction ( $∠$ r) angle of emergence ( $∠$ e) and the angle of deviation ( $∠$ D) as shown in the diagram. The correctly marked angles are:

Q. In an experiment to trace the path of a ray of light passing through a rectangular glass slab, four students measured the angles of incidence (i), angles of refraction (r) and angles of emergence (e) as shown in the diagrams:

The correct measurement is given in the diagram:
(1) A
(2) B
(3) C
(4) D

Q. (a) A ray 'PQ' of light is incident on the face AB of a glass prism ABC (as shown in the figure) and emerges out of the face AC. Trace the path of the ray. Show that

∠ i + ∠ e = ∠ A + ∠ δ

δ

and e denote the angle of deviation and angle of emergence respectively.

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δ

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(b) Find out the relation between the refractive index (

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A = 60^{\circ}

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