How do stars produce radiation?

Stars produce radiation through the process of nuclear fusion occurring in their cores. In this process, hydrogen nuclei fuse to form helium, releasing vast amounts of energy in the form of light and heat. This energy radiates outward, creating the star's luminosity and enabling it to emit electromagnetic radiation across various wavelengths, including visible light, ultraviolet, and infrared. The balance between the gravitational forces pulling inward and the radiation pressure pushing outward maintains the star's stability throughout its life cycle.