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Refraction through Glass Slab

A student tra...

Question

A student traces the path of a ray of white light through a rectangular glass slab and marks, the angles of incidence $(∠ i)$ refraction $(∠ r)$ and emergence $(∠ e)$ as shown. Which angle or angles has he not marked correctly?

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 C

Incident and emergent angles are measured from the normal of the plane.

The Correct Answer is C

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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

In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab.

(a) Complete the path of the ray till it emerges out of the slab.

(b) In the diagram, mark the angle of incidence (i) and the angle of refraction (r) at the first interface. How is the refractive index of glass related to the angles i and r ?

(c) Mark angle of emergence by the letter e. How are the angles i and e related ?

(d) Which two rays are parallel to each other ?

(e) Indicate in the diagram the lateral displacement between the emergent ray and the incident ray. State one factor that affects the lateral displacement.

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