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Deviation in Prism

The emergent ...

Question

The emergent ray in a prism bends ______ the normal.

A

Towards

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B

Away from

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C

Both A and B

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D

None of the above

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Solution

The correct option is B Away from
When an incident ray of light enters a prism it gets refracted towards the normal. This refracted ray then strikes the other face of the prism and further deviates away from the normal and leaves the glass prism to enter the air i.e. from one medium to the other. This ray that leaves the prism is called emergent ray. Thus the emergent ray bends away from the normal.

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Similar questions

Q. When the refraction takes place through a glass prism the emergent ray always bends towards the .......... of prism.

Q. Analyse the given statements and choose the correct option.
Statement 1 : When a ray of light passes through a prism, it bends towards the thicker part of the prism.
Statement 2 : An incident ray strikes a prism, undergoes refraction and comes out as emergent ray.

In refraction of light through a prism, the light ray:

(a) suffers refraction only at one face of the prism

(b) emerges out from the prism in a direction parallel to the incident ray

(c) bends at both the surfaces of prism towards its base

(d) bends at both the surfaces of prism opposite to its base

Q. Fill in the blanks with suitable words :
(a) When a ray of light enters a prism, it bends ___ the normal ; as it leaves the prism, it bends ___ the normal.
(b) White light is composed of ___ colours. The colour of white light deviated through the largest angle by a prism is ___

Q. A student traces the path of a ray of light through a triangular glass prism for different values of angle of incidence. On analysing the ray diagrams, which one of the following conclusions is he likely to draw?
(a) The emergent ray is parallel to the incident ray.
(b) The emergent ray bends at an angle to the direction of the incident ray.
(c) The emergent ray and the refracted ray are at right angles to each other.
(d) The emergent ray is perpendicular to the incident ray.

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