MCQ
If the work function of a metal is $6.63 \times 10^{-19}\, J$, the maximum wavelength of the photon required to remove a photoelectron from the metal is $....\,nm.$ (Nearest integer)
[Given : $h =6.63 \times 10^{-34}\, J \,s$, and $c =3 \times 10^{8} \,m\, s ^{-1}$ ]
- ✓$300$
- B$30$
- C$45$
- D$100$
