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Question

In the achromatic prism, we have :
deviation without dispersion
dispersion without deviation
refraction without deviation
deviation and reflection

A

deviation without dispersion

B

deviation and reflection

C

dispersion without deviation

D

refraction without deviation

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Solution

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In an achromatic prism the deviation difference due to different wavelength is zero. So, dispersion is zero but deviation of all light takes place with same angle. Hence, in achromatic prism deviation without dispersion takes place.

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