2006-11-20 13:44:56 · 6 answers · asked by Lanie 1 in Science & Mathematics ➔ Physics
The word, radiation comes from the same root word as radius meaning like the spokes of a wheel. It usually refers to electromagnetic radiation which travels in concentric waves from a central point like water waves travelling outward from the point where you dropped a pebble in a pond.
2006-11-20 17:10:44 · answer #1 · answered by JimWV 3 · 0⤊ 0⤋
Radiation in Physics is the process of emitting energy in the form of waves or particles. Various types of radiation may be distinguished, depending on the properties of the emitted energy/matter, the type of the emission source, properties and purposes of the emission, etc. When used by the general public, the word "radiation" commonly refers to ionizing radiation.
2006-11-20 13:47:44 · answer #2 · answered by Dark Knight 3 · 0⤊ 0⤋
Radiation is the emission of electromagnetic waves (photons - an electron and positron pair).
Electromagnetic waves travel at the speed of light.
The spectrum of electromagnetic waves from lowest to highest energy is: Radio waves, Infrared waves, Microwaves, Visible Light, Ultraviolet rays, X-ray, Gamma rays
Radio waves being the least interactive with molecules and Gamma rays being the most interactive (commonly from radioactivity and can be fatal)
The Sun heats Earth by radiation.
2006-11-20 14:19:06 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Radiation is the transmission of waves through the air. Or otherwise known as "infrared heat waves". The sun or the microwave would be a great example. We cannot touch, hear, or taste this type of energy.
2006-11-20 13:55:56 · answer #4 · answered by roflyounotfunny 3 · 0⤊ 0⤋
Electro-magnetic energy
2006-11-20 13:52:20 · answer #5 · answered by S.A.M. Gunner 7212 6 · 0⤊ 0⤋
Energy that is using the open space for propagation.
2006-11-20 13:47:14 · answer #6 · answered by Chris J 6 · 0⤊ 0⤋