2.
Just like visible light, infrared light, and radio waves, ultraviolet light is electromagnetic radiation.
On the spectrum, ultraviolet light lies between violet light and x rays, with wavelengths ranging from
four to 400 nanometers. Although it is undetectable to the naked eye, anyone who has been exposed
to too much sunlight has probably noted the effects of ultraviolet light, for it is this radiation that causes
tanning, sunburn, and can lead to skin cancer.

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