frequency f = 2.57 x 1015 Hz ,
work function = 3.40 eV
energy E = hf = 6.625 x 10-34 J-s x 2.57 x 1015 = 17.026 x 10-19 J = 10.63 eV
from einstiens relation
E = work function + kinetic energy
kinetic energy = 10.63 eV- 3.40eV = 7.23 eV = 11.58 x 10-19 J
A beam of ultraviolet radiation, with frequency of 2.570×1015 Hz is directed on a clean metal...
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