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similar manner to near infrared but differs in terms of wavelength. Science aside, the tangible benefits of far infrared are significant, as this system heats the body from within and produces the kind of profuse sweating normally only seen with traditional wet-dry sauna systems.
Examples: Warm objects, such as the human body, produce large amounts of infrared, and heat-sensitive CCTV cameras work by detecting these infrared waves. Half of the energy produced by the sun is infrared, so we are being bombarded by it constantly.
https://infraredsauna.com/blog/near-infrared-vs-far-infrared-heat/

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used by scientists to describe the entire range of light that exists. the range of wavelengths or frequencies over which electromagnetic radiation extends.
https://earthsky.org/space/what-is-the-electromagnetic-spectrum

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Gamma-rays can be used to treat cancer, and gamma-ray bursts are studied by astronomers. A penetrating electromagnetic radiation of a kind arising from the radioactive decay of atomic nuclei.
https://www.livescience.com/50215-gamma-rays.html

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part of the EM spectrum that people encounter most in everyday life, although much of it goes unnoticed. It is invisible to human eyes, but people can feel it as heat
https://www.livescience.com/50260-infrared-radiation.html

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Microwaves are a non-ionizing radiation, produced inside the oven by an electron tube called a magnet. The microwaves are reflected within the metal interior of the oven where they are absorbed by food.
examples: Microwaves are used to detect speeding cars and to send telephone and television communications. Industry uses microwaves to dry and cure plywood, to cure rubber and resins, to raise bread and doughnuts, and to cook potato chips.
https://www.fda.gov/radiation-emittingproducts/resourcesforyouradiationemittingproducts/ucm252762.htm

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Near infrared light is contained within the spectrum of natural sunlight. The sun emits nearly half of its total energy in the near infrared (NIR) spectrum. We are biologically wired to use near infrared energy, much like sunlight is needed to produce vitamin D. Our bodies require this energy from sunlight to survive and to thrive.

Near infrared systems are effective at rejuvenating the skin, help raise core body temperature, improve circulation and can provide pain relief.
https://infraredsauna.com/blog/near-infrared-vs-far-infrared-heat/

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The photoelectric effect occurs when light shines on a metal. Sometimes electrons are emitted.

http://physics.bu.edu/~duffy/semester2/c34_photoelectric.html

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one trillionth of a metre, which is the SI base unit of length.
https://www.vocabulary.com/dictionary/picometer

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Radio-wave communications signals travel through the air in a straight line, reflect off of clouds or layers of the ionosphere, or are relayed by satellites in space. They are used in standard broadcast radio and television, shortwave radio, navigation and air-traffic control, cellular telephony, and even remote-controlled toys.
https://www.britannica.com/science/radio-wave

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Although ultraviolet light is energetic enough to break some chemical bonds, it is not (usually) considered a form of ionizing radiation. The energy absorbed by molecules can provide the activation energy to start chemical reactions and may cause some materials to fluoresce or phosphoresce.
https://www.thoughtco.com/definition-of-ultraviolet-radiation-604675

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Visible light is the light humans see with their eyes. Visible light comes primarily from the sun, but also from other natural and manmade light sources. The visible light spectrum is the range of wavelengths that make up visible light.
https://sciencing.com/properties-visible-light-spectrum-8101926.html

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define light as a collection of one or more photons propagating through space as electromagnetic waves.
https://science.howstuffworks.com/light6.htm

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An X-ray is a quick, painless test that produces images of the structures inside your body — particularly your bones.

X-ray beams pass through your body, and they are absorbed in different amounts depending on the density of the material they pass through.
https://www.mayoclinic.org/tests-procedures/x-ray/about/pac-20395303