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Q.

Light of frequency 4 $v_{0}$ is incident on the metal of the threshold frequency $v_{0}$ . The maximum kinetic energy of the emitted photoelectrons is

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a

$3 {hv}_{o}$

b

$\frac{3}{2} {hv}_{o}$

c

$2 {hv}_{o}$

d

$\frac{1}{2} {hv}_{o}$

answer is A.

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Detailed Solution

$E = {hv}_{o} + K_{\max} \Rightarrow K_{\max} = 3 {hv}_{o} .$

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Light of frequency 4v0 is incident on the metal of the threshold frequency v0. The maximum kinetic energy of the emitted photoelectrons is