He is an expert in nuclear physics.

He is an expert in nuclear physics and has won many awards in the field.

He is an expert in astrophysics, and his research is highly valued around the world.

He is an expert in applied physics.

This particle is very small.

He is known as a person with learning.

The muon plays an important role in particle physics.

He told me the whole story of the incident.

Beta particles have the same charge as electrons.

A boson is an important concept in physics.