CUET Preparation Today
If the photons of frequency v are incident on the surfaces of metal A and B of threshold frequencies v/2 and v/3 respectively, then what will be the ratio of the maximum kinetic energy of electrons emitted from A to that of B ? |
2:3 3:4 1:3 9:4 |
3:4 |
hv=hv/2 + Ka ⇒ Ka=hv/2 hv=hv/3 + Kb ⇒ Kb=2hv/3 divide the two equations to get 3:4. |
