Which of the following statements are correct | vedclass

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(D) The threshold frequency of $Cs$ is $
u_0 = 5.16 	imes 10^{14} \ Hz$.Yellow light has a frequency range of approximately $5.17 	imes 10^{14} \ H

Vedclass · Accepted Answer

$A, B, D$ and $E$ Only

Vedclass · Answer

(D) The threshold frequency of $Cs$ is $
u_0 = 5.16 	imes 10^{14} \ Hz$.Yellow light has a frequency range of approximately $5.17 	imes 10^{14} \ Hz$ to $5.26 	imes 10^{14} \ Hz$,which is greater than $
u_0$,so it causes the photoelectric effect ($A$ is correct).Decreasing the intensity (brightness) of light reduces the number of photons,thus reducing the photocurrent ($B$ is correct).Red light has a frequency lower than the threshold frequency of $Cs$,so it cannot produce a photoelectric effect ($C$ is incorrect).Blue light has a higher frequency than yellow light,so it exceeds the threshold frequency and produces current ($D$ is correct).White light contains all visible frequencies,including those above the threshold,so it produces current ($E$ is correct).Therefore,statements $A, B, D,$ and $E$ are correct.

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