1.

If photons of frequency v are incident on the surfaces of metals. A and B of threshold frequencies (v)/(2)and (v)/(3) respectively, the ratio of the maximum kinetic energy of electrons emitted from A to that from B is

Answer»

`2:3`
`3:4`
`1:3`
`sqrt(3): sqrt(2)`

Solution :As per RELATION H `(V- v_(0))=K_("max")h(v-(v)/(2))= K_(1)` and `h(v-(v)/(3))= K_(2)implies (K_(1))/(K_(2))=(2)/(3)`


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