In the experimental arrangement to study variation of photocurrent, the frequency of light is changed by

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reflecting it from a polished surface

by putting a polaroid sheet in the path of light

by passing it through a narrow slit

by using appropriate coloured filter or coloured glass in the path of light

answer is D.

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Detailed Solution

The frequency of light can be changed by using appropriate coloured filter or coloured glass in the path of light

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