Physics, 20.04.2020 20:37, aronhaile

There are two categories of ultraviolet light. Ultraviolet A ( UVA ) has a wavelength ranging from 320 nm to 400 nm . It is not so harmful to the skin and is necessary for the production of vitamin D. UVB, with a wavelength between 280 nm and 320 nm , is much more dangerous, because it causes skin cancer.

Find the frequency ranges of UVA.
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There are two categories of ultraviolet light. Ultraviolet A ( UVA ) has a wavelength ranging from 3...