Q.

A photon of energy 3.4 eV is incident on a metal having work function 2 eV. The maximum K.E. of photoelectrons is equal to

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a

1.4 eV

b

1.7 eV

c

5.4 eV

d

6.8 eV

answer is A.

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Detailed Solution

Kmax=E−Wo=3.4−2eV=1.4eV
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A photon of energy 3.4 eV is incident on a metal having work function 2 eV. The maximum K.E. of photoelectrons is equal to