Radiation of a certain wavelength causes electrons with a maximum kinetic energy of 0.65 eV to be ejected from a metal surface whose work function is 2.65 eV. What will be the maximum kinetic energy (in eV) with which this same radiation ejects electrons from another metal whose work function is 2.15eV.

Answer

`1.05 eV`

Explanation

Here, `K_(max 1)=0.65 eV , phi_(0)=0.65+2.65=3.20 eV`
Case (ii)
`(K_(max))_(2)=hv-phi_(02) =3.20-2.15=1.05 eV`