The work of function of a certain metal is \( 2.3 \mathrm{eV} \). If light of wave number \( 2 \....

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The work of function of a certain metal is \( 2.3 \mathrm{eV} \). If
\( \mathrm{P} \)
light of wave number \( 2 \times 10^{6} \mathrm{~m}^{-1} \) falls on it, the
W.
kinetic energies of fastest and slowest ejected electron will be respectively
(1) \( 2.48 \mathrm{eV}, 0.18 \mathrm{eV} \)
(2) \( 0.18 \mathrm{eV} \), zero
(3) \( 2.30 \mathrm{eV}, 0.18 \mathrm{eV} \)
(4) \( 0.18 \mathrm{eV}, 0.18 \mathrm{eV} \)


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