-
When the energy of the incident radiation is incredased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is :
-
- 0.65 eV
- 1.0 eV
- 1.3 eV
- 1.5 eV
Correct Option: B
According to Einstein’s photoelectric equation, hν = φ0 + Kmax
We have
hν = φ0 + 0.5 ...(i)
and1.2hν = φ0 + 0.8 ...(ii)
Therefore, from above two equations φ0 = 1.0 eV.
