What does the electromagnetic spectrum include?
Electromagnetic Radiation is one of the four “forces” to include EM, gravity, and the strong and weak nuclear forces. The EM emissions in the spectrum differ only in their frequency, wavelength and amplitude (strength). Wavelength ranges from, for example HAM/CB Radio with very large wavelengths (miles wide or more) to gamma radiation with wavelenths of the scale of smaller than a trillionth of a meter. Visible light is a very small slice of the electromatic spectrum; true green, the color to which your eye is most sensitive is 555 nanometers wavelength. A very high energy, hot objects like a star or thermonuclear explosion emits all frequencies of EM Radiation. Remember all EM Radiation in a vacuum travels at the speed of light so frequency is calculated by dividing C (the speed of light) by the specific wavelength of the radiation.
