Light with a frequency of 1.5 times the thres | vedclass

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(D) The threshold frequency is $f_0$. The initial frequency of incident light is $f = 1.5 f_0$.Since $f > f_0$,photoelectric emission occurs.Now,the f

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Zero

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(D) The threshold frequency is $f_0$. The initial frequency of incident light is $f = 1.5 f_0$.Since $f > f_0$,photoelectric emission occurs.Now,the frequency is halved: $f' = \frac{1.5 f_0}{2} = 0.75 f_0$.For photoelectric emission to occur,the incident frequency must be greater than or equal to the threshold frequency $(f \ge f_0)$.Since $0.75 f_0 Therefore,no photoelectric emission will take place,regardless of the increase in intensity.Thus,the photoelectric current will be $0$.

Light with a frequency of $1.5$ times the threshold frequency is incident on a photosensitive material. If the frequency is halved and the intensity is doubled,what will be the photoelectric current?

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