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
Part A What are the ranges of the wave numbers for UVA?
kmin, kmax=____________rad/m
Part B What are the ranges of the wave numbers for UVB?
kmin,kmax=______________rad/m