The threshold frequencies for photoemission for three metals numbered 1,2,3 are respectively `v_(1), v_(2), v_(3) and v_(1) gt v_(2)gt v_(3)`. An incident radiation of frequency `v_(0)gtv_(2)`…………………cause the photoemission from 3 but…………….cause photoemission from 1.

The wavelengths and frequencies of photons in transition 1,2 and 3 for hydrogen like atom are lambda_(1),lambda_(2),lambda_(3), v_(1),v_(2) and v_(3) respectively. Then:

From the above figure the values of stopping potentials for M_(1) and M_(2) for a frequency v_(3)( gt v_(02)) of the incident radiatioins are V_(1) and V_(2) respectively. Then the slope of the line is equal to

Beast are produced by frequencies v_(1) and v_(2) (v_(1) gt v_(2)) . The duration of time between two sucessive maximum or minima is equal to

Photoelectric emission is observed from a metal surface for frequencies v_(1) and v_(2) incidents radiations (v_(1) gt v_(2)) . If the maximum kinetic energy of the two electrons are in the ratio 1:2 , then how is threshold frequency (v^(@)) experssed.

Photoelectric emission is observed from a surface for frequencies v_(1) "and" v_(2) of the incident radiation (v_(1) gt v_(2)) . If maximum kinetic energies of the photo electrons in the two cases are in the ratio 1:K , then the threshold frequency is given by:

Photoelectric emission is observed from a surface for frequencies v_(1) and v_(2) of incident radiations (v_(1) gt v_(2)) . If the maximum kinetic energy of photoelectrons in the two cases are in the ratio of 2 : 1 then threshold frequency v_(0) is given by.

When the light of frequency 2 v_(0) (where v_(0) is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is v_(1) . When the frequency of the incident radiation is increased to 5 v_(0) , the maximum velocity of electrons emitted from the same plate is v_(2) . the ratio of v_(1) to v_(2) is