what kind of rays does radiation
There are other, perhaps less commonly known, types of radiation that the sun emits: 1  Gamma rays - these are most often found in the core of the sun, during fusion. These rays lose frequency as they move towards the surface. 2  X-rays - X-rays are emitted by the sun during solar flares.
Radioactivity refers to the amount of ionizing radiation released by a material. Whether it emits alpha or beta particles, gamma rays, x-rays, or neutrons, a quantity of radioactive material is expressed in terms of its radioactivity (or simply its activity).