PHYSICS - LAWS OF PHOTO ELECTRIC EMISSION

LAWS OF PHOTO ELECTRIC EMISSION

1. Each photon librates only one photo electrron.

2. For a given senstive surface, there exists a minimum frequency of incident radiation at which emission starts known as Threshold Frequency.

3. The maximum kinetic energy and the maximum velocity of emmited photo - electron linerly depends on the frequency of incident radition but it is independent of intensity of radiation.

4. The strngth of photo - electric current is proporrtional to intensity of incident radiation.

5. There is no time lag between incident photon and emitted photo - electron.

              The above laws are called Laws of Photo Electric Emission.