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

Question

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

Aicharya · Accepted Answer

h c λ 1 - ϕ h c λ 2 - ϕ = u 1 2 u 2 2 ϕ = 3.7 e V

A metal surface is illuminated by light of two different wavelengths 248 nm and 310 nm. The maximum speeds…

Solution