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Question
The angle between the incident ray and emergent ray, when the ray is passing through an equilateral prism is called angle of :
The angle between the incident ray and emergent ray, when the ray is passing through an equilateral prism is called angle of :
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Solution
The correct option is D deviation
It is the angle of deviation. When the white light strikes the first surface, it undergoes dispersion to give the seven colors VIBGYOR each having a different angle of refraction. This refracted ray strikes the second surface of the prism where each light will strike with a different angle of incidence. Thus, the seven bands will be more distantly spaced and will be further deviated from the incident ray.
It is the angle of deviation. When the white light strikes the first surface, it undergoes dispersion to give the seven colors VIBGYOR each having a different angle of refraction. This refracted ray strikes the second surface of the prism where each light will strike with a different angle of incidence. Thus, the seven bands will be more distantly spaced and will be further deviated from the incident ray.
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