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

1.4 eV

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1.7 eV

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5.4 eV

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6.8 eV

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Solution

The correct option is A 1.4 eV
$K_{m a x} = (E - W_{0}) = (3.4 - 2) e V = 1.4 e V$

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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 photo-electrons is equal to

The correct option is A 1.4 eVKmax=(E−W0)=(3.4−2) eV=1.4 eV

The correct option is A 1.4 eV
$K_{m a x} = (E - W_{0}) = (3.4 - 2) e V = 1.4 e V$