1.

Light emitted during the de excitation of electron from n = 3 to n = 2, when incident on a metal, photoelectrons are just emitted from that metal. In which of the following de excitations photoelectric effect is not possible ?

Answer»

From n=2 to n=1
From n=3 to n=1
From n=5 to n=2
From n=4 to n=3

Solution :The photoelectric effect is possible when LIGHT of sufficient energy incident on metal SURFACE. When electron de EXCITES FORM n=3 to n=2, the light PRODUCED photolectric effect. So for the given options, the photoelectric effect is not possible for that level in which energy of emitted light is less than that for n=3 to n=2
`(hv)_(4-3) lt (hv)_(3-2)`


Discussion

No Comment Found

Related InterviewSolutions