【About Ultraviolet Rays】
2022-07-20
The light that reaches the earth from the sun is divided into infrared rays, ultraviolet rays, and
visible rays (rainbow colors). Visible lights are purple, indigo, blue, green, yellow, orange, and red
in ascending order of wavelength, but ultraviolet rays with a shorter wavelength than purple and
infrared rays with a wavelength longer than red are invisible.
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