SSC SCIENCE STUDY MATERIAL

Law of photoelectric emission

1.   For a given metal and frequency of incident light the no. of photoelectron ejected per second is directly proportional to the intensity of incident light.

2.   For a given metal there exist a minimum frequency of incident light below which no emission of photoelectron take place called as threshold frequency.

3.   The photoelectric emission is an instantaneous process.

4.   The maximum K.E is independent of the intensity of incident light.
Einstein photoelectric equation




Acc. To Einstein when photon of energy fall on the metal surface the energy of the photon is absorbed by the free electron in a metal.

Critical frequency

It is defined as the highest frequency which when sent straight toward ionosphere get reflected from the ionosphere and return to the earth.

Reading all those points will help you remember important points which
will help in easy and quick answer of the SSC general knowledge
questions or other competitive exam

do like us for daily updates www.fb.com/goddingodotcom

Leave a Reply