Describe photoelectric effect and state the laws of photoelectric emission.

Explanation

### Step-by-Step Solution:

1. **Definition of Photoelectric Effect:**
The photoelectric effect refers to the phenomenon where electrons are emitted from the surface of a metal when it is exposed to electromagnetic radiation (light) of a certain minimum frequency. This occurs because the energy from the incident light is absorbed by the electrons, providing them with enough energy to overcome the attractive forces holding them in the metal.

2. **Emission of Photoelectrons:**
The electrons that are ejected from the metal surface due to this effect are known as photoelectrons. When light of sufficient energy strikes the metal, it causes these electrons to be released.

...