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Standard XII
Physics
Problems on Prism
Question

A ray of white light is incident on a glass prism. Which ray diagram shows the ray as it passes through the prism and emerges from the opposite side?

A
B
C
D
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Solution
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Correct option is C.
The diagram in option (C) represent the emergence of light from prism.
We know that the wave having larger wavelength suffer least deviation and vice -versa. So, the red will suffer least deviation with respect to violet colour.
Therefore the spectrum will have Red on upper part and violet on lower part.

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