White light, with frequencies ranging from 4.00 x 10^14 hz to 7.90 x 10^14 hz, is incident on a barium surface. given that the work function of barium is 2.52 ev, find:
(a) the maximum kinetic energy of electrons ejected from this surface.
(b) the range of frequencies for which no electrons are ejected.

0.7515875 eV

Explanation:

f = Maximum frequency =

h = Planck's constant =

W = Work function = 2.52 eV

Converting to Joules

Maximum photon energy is given by

Maximum Kinetic energy is given by

Converting to eV

The maximum kinetic energy of electrons ejected from this surface is 0.7515875 eV

The range of frequencies for which no electrons are ejected is

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