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Which of the following is not correct w.r.t. photoelectric effect?

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There is no time lag between the striking of light and the ejection of photo electrons from the surface of metal.

Energy of photoelectrons is directly proportional to the frequency of incident light.

The number of ejected photo electrons is directly proportional to the intensity of the incident light.

The frequency of the incident light is called threshold frequency.

answer is D.

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Detailed Solution

The threshold frequency is the minimum frequency below which a metal will not eject electrons $(v_{0})$ .

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