Physics - Modern Physics Question with Solution | TestHub

According to Einstein's photoelectric equation, the maximum kinetic energy of emitted photoelectrons is given by:

$K_{\max }=hv-\Phi$

where $h$ is Planck's constant, $v$ is the frequency of incident radiation, and $\Phi$ is the work function of the material.

The stopping potential $V_0$ is related to the maximum kinetic energy by:

$e{V}_0=K_{\max }$

Substituting this into the photoelectric equation gives:

$e{V}_0=hv-\Phi$

$V_0=\frac{h}{e}v-\frac{\Phi }{e}$

From this linear relationship, it is evident that the stopping potential $V_0$ increases as the frequency of incident radiation $v$ increases.

Answer: increases