Question

How do the sun and other stars make light?

Answer 1

Fusion reaction at core of star.

Explanation:

Under very high pressure and temperature hydrogen atoms fused into helium atom and a part of matter is converted into energy as per E=,Mc ^2.
The gama rays produced in this fusion after traveling through layers of Sun become visible light and Infra red ..
for details see link https://en.wikipedia.org/wiki/Proton%E2%80%93proton_chain_reaction