Abscess An abscess is has several causes and can appear o...learn more >>. Breast Cancer Breast cancer is the second leading cause o...learn more >>. Cancer of the Mouth and Throat Cancer of the mouth and throat may look like an ulcer or a sore on the tongue, lips, inside lining of the cheeks, and other structures.
Electromagnetic radiation is the consequence of this - the fields move with the speed of light and 'radiate' from a source. I'm not sure what you mean by 'Like what type of radiation are they talking about'. Anything that is radiated, that emanates from an object, is radiation. It's nothing to do with radioactivity - well, gamma is a specific type of electromagneitc radiation, but alpha and beta are not. The electromagnetic spectrum is the combination of all types of electromagnetic radiation. We artificially divide the spectrum up into categories based on the effects of the radiation and the causes of the radiation, but in essence there's not much difference between a low-frequency radio wave and a high-frequency gamma ray, apart from the frequency.
Rather, we are talking about the waves that transmit radio signals. The main difference between radio waves and sound waves is that radio waves are a type of electromagnetic wave that can travel when there is no medium, whereas sound waves are a type of mechanical wave that cannot travel if there is no medium. What are Radio Waves. Radio waves are electromagnetic waves. These are waves composed of electric and magnetic fields, which are oscillating at right angles to each other. The energy of an electromagnetic wave propagates at a direction at right angles to the oscillations in both the electric and magnetic fields.