Question: What is the photoelectric effect in the context of semiconductors?

Options:

1. Emission of electrons when light hits a material
2. Absorption of light by electrons
3. Reflection of light from a surface
4. Transmission of light through a material

Correct Answer: Emission of electrons when light hits a material

Solution:

The photoelectric effect refers to the emission of electrons from a material when it is exposed to light, which is a fundamental principle in semiconductor devices like photodiodes.