Question

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57. In photoelectric effect, if a weak intensity radiation instead of strong intensity of suitable frequency is used then :
(1) Photoelectric effect will get delayed
(2) Photoelectric effect will not take place
(3) Maximum kinetic energy will decrease
(4) Saturation current will decrease

Answer 1

Dear Student ,
If weak intensity radiation is used instead of strong intensity of suitable frequency is used then (ii) photoelelctric effect will not take place .
As a certain frequency of radiation is needed for electrons from the surface of a metal to come out .Thus weak intensity of radiation will not be able to get this electrons out but strong intensity of radiation will surely do so .Thus here if we use weak intensity of radiation photo electric effect will not take place .

Regards