1.

Electrons are emitted with kinetic energy T from a metal plate by an irradiation of light of intensity J and frequency upsilon Then which of the following will be true?

Answer»

`T PROP J`
T linearly increasing with `upsilon`
`T prop` time of irradiation
Number of electrons EMITTED `prop` J

Solution :(b,d) Hence, intensity of irradiation, `J= i E = ((dq)/(dt)). E`
` rArr J = (e (dN)/(dt))(H upsilon) rArr J prop (dN)/(dt)`
`(dN)/(dt)` = rate of emission of electrons and
`E = h upsilon` = energy of each electron .
Again, as PER the theory of photoelectric emission,
`h upsilon KE _(max) + phi_(0) rArr h upsilon = T + phi_(0)`
`rArr` T is linearly increasing with `upsilon` .


Discussion

No Comment Found

Related InterviewSolutions