An electromagnetic wave of wavelength $’\lambda ‘$ is incident on a photosensitive surface of negligible work function. If ‘m’ mass of photoelectron emitted from the surface has de-Broglie wavelength $\lambda_d$, then:

(1) $\lambda  = \left( {\frac{{2m}}{{hc}}} \right){\lambda _d}^2$
(2) ${\lambda _d} = \left( {\frac{{2mc}}{h}} \right){\lambda ^2}$
(3) $\lambda  = \left( {\frac{{2mc}}{h}} \right){\lambda _d}^2$
(4) $\lambda  = \left( {\frac{{2h}}{{mc}}} \right){\lambda _d}^2$ Continue reading An electromagnetic wave of wavelength $’\lambda ‘$ …. →