UV-A Rays are important for the skins production of vitamin D; however, they tan

Question

UV-A Rays are important for the skins production of vitamin D; however, they tan and damage the skin. UV-B Rays can cause skin cancer. The wavelength range of UV-A Rays is 320nm to 400 nm and that of UV-B Rays is 280 to 320nm.
What is the lower frequency of UV-A? What is the upper frequency of UV-A?
What is the lower and upper frequency of UV-B? UV-A Rays are important for the skins production of vitamin D; however, they tan and damage the skin. UV-B Rays can cause skin cancer. The wavelength range of UV-A Rays is 320nm to 400 nm and that of UV-B Rays is 280 to 320nm.
What is the lower frequency of UV-A? What is the upper frequency of UV-A?
What is the lower and upper frequency of UV-B?
What is the lower frequency of UV-A? What is the upper frequency of UV-A?
What is the lower and upper frequency of UV-B?

Explanation / Answer

Frequency= speed of light / wavelength

lower frequency of UV-A= 9.36*1014 Hz

upper frequency of UV-A=7.49*1014 Hz

lower and upper frequency of UV-B

lower = 1.07*1015Hz

upper= 9.36*1014 Hz

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