Question

Write Einstein's photo electric equation.

Answer 1

Einstein's photoelectric equation is
$\frac{1}{2}m{v}_{max}^2=h(v-v_0)$
where $h\nu \to$ energy of incident photon.
$h{\nu }_0\to$ work function
$\frac{1}{2}m{v}_{max}^2=$ max KE of ejected of the metal electrons.