What is radiation?、
Radiation in physics refers to the transfer of energy in waves or subatomic particles in a vacuum or medium.In human language, radiation is a form of energy transfer -- the lights in your home, the microwaves in the microwave, the ultrasound, the sunlight above your head, the gravitational waves discovered last year...Simply put, anything that glows, heats up, or releases energy has radiation, including an average body temperature of 37 degrees Celsius. You're also radiating heat around you.
