Question

the minimum energy necessary to overcome the attractive force between the electron and the surface of silver metal is 7.52×10^-19 J What will be the maximum kinetic energy of the electrons ejected from silver which is being irradicated with ultraviolet light having a wavelength 360A°​

Answer 1

Energy absorbed =hcλ

⇒6.625×10−27×3.0×1010360×10−8

⇒5.52×10−11erg

⇒5.52×10−18J

∴Eabsorbed=E used in attractive forces +kinetic energy of electron

⇒5.52×10−18−7.52×10−19J

⇒47.68×10−19J