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Q.

The maximum kinetic energy of the emitted photo electrons from a photosensitive material of work function ϕ , when light of frequency 'υ' incident on it is ‘E’. If the frequency of incident light is '3υ' , the maximum kinetic energy of the emitted photoelectrons is  

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a

3E−2ϕ

b

2E−3ϕ

c

3E+2ϕ

d

2E+3ϕ

answer is A.

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Detailed Solution

KE=hυ−ϕ

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