Radiation is the ability to feel human sensitivity to radiation of the object. Feel radiation (French: radiesthesie; English: radiesthesia; derived from radium-prefix in Latin means "radiation" and from aisthesis in Greek means "sensitive").

Electromagnetic radiation (or electromagnetic waves) is a combination (of vector) of the fluctuating electric field and magnetic field perpendicular to each other, spread through space like waves. Electromagnetic waves also quantum chemical into "waves" have properties such as moving particles called photons.