The work function of a certain metal is ...

The work function of a certain metal is 2.3 eV. If light of wave number `2 xx 10^(6)m^(-1)` falls on it, the kinetic energies of fastest and slowest ejected electron will be respectively.

2.48 eV , 0.18 eV

0.18 eV, zero

2.30 eV, 0.18 eV

0.18 eV , 0.18 eV

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