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.

Radiation of a certain wavelength causes electrons with a maximum kine

1.	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» Correct Answer - `1.05 eV` 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`

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