Electromagnetic spectrum

c = λ f

c = speed of light = electromagnetic wave velocity = 3 * 10^8 m/sec

Therefore, the longer the wavelength, the higher the frequency.

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From high frequency (low wavelength) to low frequency (high wavelength)

1. gamma-rays
2. x-rays
3. light
   • ultraviolet
   • visible light
   • infra-red
   • thermal IR
4. microwaves
5. radio