Question

The work function of metals is in the
range of 2 eV to 5eV. Find which of
the following wavelength of light
cannot be used for photoelectric
effect. (Consider, Planck constant =
4x 10-15 eVs, velocity of light = 3 x
108m/s)​

Answer 1

Explanation:

s, velocity of light = 3 xx 10^(8) m//s) The energy of the incident photons should not be less than 2eV. Therefore, light of wavelength 650 nm cannot be used for photoelectric effect