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Physics, 29.09.2019 12:20 keriyannafultz
Which type of wave has a frequency just higher than violet visible light and is used by the skin to produce vitamin d?
a. x-rays
b. microwaves
c. light
d. ultraviolet
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Answers: 1
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Which type of wave has a frequency just higher than violet visible light and is used by the skin to...
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