Question

Light is capable of transferring electrons to the free-state inside a material thus increasing the electrical conductivity of the material. When the energy imparted to the electrons is quite large, the latter may be emitted from the material into the surrounding medium. This phenomenon is known as
1. Photoemissive effect
2. Photovoltaic effect
3. Photoconductivity effect
4. photo absorptive effect

Answer 1

Correct Answer - Option 1 : Photoemissive effect

Light is capable of transferring electrons to the free state inside a material thus increasing the electrical conductivity of the material. When the energy imparted to the electrons is quite large, the latter may be emitted from the material into the surrounding medium. This phenomenon is known as the photoemissive effect or photoemissivity.

Whereas the increased electrical conductivity produced by light is called a photoconductive effect or photoconductivity.