The frequency and work function of an incident photon are v and φ0 . If v0 is the threshold frequency, then necessary condition for the emission of photoelectron is

Question

The frequency and work function of an incident photon are v and φ0 . If v0 is the threshold frequency, then necessary condition for the emission of photoelectron is (A)  v < v0  (B)  v = (v0/2)  (C)  v ge v0  (D) None of these

Tardigrade Admin · Accepted Answer

The photoelectric equation is given by (1/2) m v2=h v-h v0 So, for maximum kinetic energy, frequency should be more than the cut-off frequency and wavelength should be less than the cut-off wavelength.

Q. The frequency and work function of an incident photon are $v$ and $ϕ_{0} .$ If $v_{0}$ is the threshold frequency, then necessary condition for the emission of photoelectron is

$v < v_{0}$

$v = \frac{v _{0}}{2}$

$v \geq v_{0}$

None of these

The photoelectric equation is given by
$\frac{1}{2} m v^{2} = h v - h v_{0}$
So, for maximum kinetic energy, frequency should be more than the cut-off frequency and wavelength should be less than the cut-off wavelength.

Q. The frequency and work function of an incident photon are v and ϕ0​. If v0​ is the threshold frequency, then necessary condition for the emission of photoelectron is

v<v0​

v=2v0​​

v≥v0​