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Question

A hollow glass prism gives
a dim spectrum
bright spectrum
no spectrum
only continuous spectrum

A

a dim spectrum

B

bright spectrum

C

no spectrum

D

only continuous spectrum

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Solution

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A hollow glass prism does not give any spectrum because it does not have any medium inside it is hollow from inside so white light can not split in vacuum because in vacuum all colors light travel with same speed hence they do not split and no spectrum is observed.

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