Question

a light source of wavelength Lambda illuminate a metal and ajax photoelectron with ke Max is equals to one electron volt another light source of wavelength Lambda battery that photo electrons from a metal with km is equals to 4 electronic the value of work function is 0.1 X then the value of x is​

Answer 1

Answer:

$K_{max} =\frac{hc}{lamda}$λ-Ф

$K_{max} =$it is the maximum kinetic energy of photoelectric with the wave length of the light producing the photo electron

$K_{1} =\frac{hc}{λ1}$-Φ

$K_{2} =\frac{hc}{λ}$-Φ

λ2=$\frac{1}{3}$λ1

$K_{2} -3K_{1} =K_{1}$=Φ

Φ=2eV $K_{1} =1eV and K_{2} =5eV$