Question

Write Einstein’s photoelectric effect equation and explain symbols used.

Answer 1

Einstein’s photoelectric effect equation is,

E = W + (Kinetic energy)${}_{max}$

Where $E=\frac{hc}{{\lambda }_{inc}}=hv$ = energy of incident photon

$W=\frac{hc}{{\lambda }_0}=h{v}_0$ = energy required by electron to come out of metal

$(K.E{)}_{max}=\frac{1}{2}m{v}_{max}^2$ maximum kinetic energy of electron coming out.