Question

The kinetic energy of photoelectrons emitted by a photosensitive surface depends on the intensity of the incident radiation.

• A. True
• B. False

Answer 1

Answer: (B)

For photoelectric effect:
$hv-h{v}_0=(KE{)}_{max}$
where h = Planck's constant,
v = frequency of incident radiation, and
$v_0$ = threshold frequency.
$\Rightarrow (K.E.{)}_{max}\alpha n$
KE does not depend on the intensity fo incident radiation.