Physics - Modern Physics Question with Solution | TestHub

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

$K_{\text{max}}=h\nu -\Phi$

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

Comparing this with the equation of a straight line $y=mx+c$, we get the slope $m=h$.

Since Planck's constant $h$ is a universal constant, the slope of the graph is the same for all metals and is completely independent of the intensity of the incident radiation.

Answer: is the same for all metals and independent of the intensity of radiation.