Where does electromagnetic radiation originate?

How and why do we control heat on a spacecraft? ... Electromagnetic radiation is different from sound in that it can travel in space and does not need a medium like air or water to travel through. ... An observant student might now ask -- I see how light can produce colors now, but where does white light come from? read more

It comes in a broad spectrum of wavelengths, frequencies and energies. Scientists break the electromagnetic spectrum into several different categories, including electrical energy, radio waves, microwave energy, infrared light, the visible spectra, ultraviolet rays, X-rays and gamma radiation. read more

EMF or electromagnetic radiation is created from an electric current that is a by-product of computing functions (e.g. phone calls, internet connections, light up panles) from electronic devices. read more

Electromagnetic radiation is a form of energy. The light that we see is a type of electromagnetic radiation. However it is only a very small part of the entire electromagnetic spectrum. Sound, another form of energy, is not part of this spectrum. read more