There are two categories of ultraviolet light. Ultraviolet A ( UVA ) has a wavel

Question

There are two categories of ultraviolet light. Ultraviolet A ( UVA ) has a wavelength ranging from 320nm to 400nm. It is not so harmful to the skin and is necessary for the production of vitamin D. UVB, with a wavelength between 280nm and 320nm , is much more dangerous, because it causes skin cancer. Find the frequency ranges of UVA. Enter your answers separated with commas. Find the frequency ranges of UVB. Enter your answers separated with commas. What are the ranges of the wave numbers for UVA? Enter your answers separated with commas. What are the ranges of the wave numbers for UVB? Enter your answers separated with commas.

Explanation / Answer

a)f=c/

Range=3*108/400*10-9 to 3*108/320*10-9

=7.5*1014,9.375*1014

b)Range=9.375*1014,1.07*1015

c)Wave number=2/

Range=1.57*107,1.96*107

d)Range=1.96*107,2.24*107

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