A photocell is receiving light from a source placed at a distance of 1 m . If the same source is to be placed at a distance of 2 m , then the ejected electrons

Question

A photocell is receiving light from a source placed at a distance of 1 m . If the same source is to be placed at a distance of 2 m , then the ejected electrons, moves with one-fourth energy as that of the initial energy., moves with one-fourth of momentum as that of the initial momentum., will be half in number., will be one-fourth in number.

MARKS App · Accepted Answer

Number of ejected electrons ∝ Intensity ∝ 1 Distance 2 Therefore an increment of distance two times will reduce the number of ejected electrons to 1 4 th of the previous one.

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