Changes

The EM spectrum consists of the following types of photon radiation (in order of increasing wavelength): microwaves, gamma rays, x-rays, ultraviolet light, visible light, infrared light and radio waves.

The EM spectrum consists of the following types of photon radiation (in order of increasing wavelength): microwaves, gamma rays, x-rays, ultraviolet light, visible light, infrared light and radio waves.

The speed of light is the same in every frame of reference, no matter how fast the source or the observer are moving, this gives rise to the [[theory of relativity]].

The [[Michelson-Morley experiment]] proved that the speed of light (and everything else that is massless) will always be measured by an observer to be the same, in every frame of reference, no matter how fast the source or the observer are moving, this gives rise to the [[theory of relativity]].

As with any wave. wavelength times frequency equals the speed of a light wave.

As with any wave. wavelength times frequency equals the speed of a light wave.