Frequency of photon having energy 66 eV is
8×10−15Hz
12×10−15Hz
16×1015Hz
None of these
E=hv⇒v=Eh=66×1.6×10−196.6×10−34=16×1015Hz
The frequency of a photon, having energy 100 eV is (h=6.610−34J−sec)