Body: People who study "Radiation physics" investigate the emission or transmission of energy in the form of waves or particles through space or through a material medium.
Some questions in "Radiation physics" involve electromagnetic radiation, acoustic radiation, particle radiation.
Some motivations are determine the age of materials that were once part of a living organism, improve medicine, better communication.
A few notable experts of "Radiation physics" include William Herschel, Johann Wilhelm Ritter.