The electromagnetic spectrum encompasses all types of electromagnetic radiation, ranging from gamma rays to radio waves. It is organized by wavelength and frequency.
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The electromagnetic spectrum includes, in order of increasing wavelength, gamma rays, X-rays, ultraviolet light, visible light, infrared radiation, microwaves, and radio waves.
Visible light is the only part of the electromagnetic spectrum that can be seen by the human eye.
Different types of electromagnetic radiation are used for various astronomical observations; for example, radio waves for studying distant galaxies and X-rays for observing black holes.
The speed of light in a vacuum is constant across all types of electromagnetic radiation and is approximately 299,792 kilometers per second.
Wavelength and frequency are inversely related: as the wavelength increases, the frequency decreases.