Chemistry - Atomic Structure Question with Solution | TestHub

A metal surface is illuminated by light of two different wavelengths$\text{248}\text{nm}$and$\text{310}\text{nm}$. The maximum speeds of the photoelectrons corresponding to these wavelengths are${\mathrm{u}}_1$and${\mathrm{u}}_2$respectively. If the ratio$\frac{{\mathrm{u}}_1}{{\mathrm{u}}_2}=\frac{2}{1}$and$\text{hc}\text{=}\text{1240}\text{eVnm}$, the work function of the metal is nearly