Question

The energy required to remove an electron from sodium is 2.3

Answer 1

2.3 ev is thus the Work Functiongiven for Na.

from photoelectric eqn.

E = W + K.E.

Determine the E for wavelength 6800 eV.

Therfore,

E = hv = 1240/680 = 1.82 eV

which is hence less than Work Function 2.3 eV.

Therefore nO photoelctic effect would happen