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The electromagnetic spectrum is a continuum of all electromagnetic waves arranged according to frequency and wavelength. The separate bands are named as : radio, microwave, infrared, visible, ultraviolet, X-ray and lastly gamma ray. The first so called ‘stage’ of the spectrum is referred to as radio. The electromagnetic wave length is long, has a low frequency and emittes low energy. An example of this area is radio, the one used everyday by millions. The second band is called microwave’ the waves slights gain energy and decreases its wavelength and frequency by a small amount. An example of such a electromagnetic wave is for microwaves that are used to heat up food. It sends microwaves through the food molecules and atoms to heat the food up quickly and efficiently. The next band is infrared. This is where the wave gains a bit more energy and decreases its frequency and wavelength by a medium-small amount. This type of band is used for infrared (determining temperature with a camera) . Another band is the visible band which is perceived by light. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres. Once again, the wavelength and frequency decrease and the energy emitted increase although in this band the increase and decreases are more visible. The following band in the spectrum is the ultraviolet band. This is where the trend continues although the differences become more clear and happen ‘quicker’. A common use for ultraviolet radiation is the fact that it produces vitamin C for you. Although UV is absorbed by glass so a person must go outside for the UV and vitamin C. Second to last is X-ray. This is where the wavelength and frequency becomes very, very small and the energy produced increases. X-ray is commonly used for X-rays in hospitals or airports to insure safety and health. Lastly there is gamma ray this has the highest frequency and shortest wavelength while the energy emitted is massive. A use for gamma ray is to kill cancer cells and atomic bombing.

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