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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
A proton and an alpha particle are released from rest when they are 0.225nm {\rm nm} apart. Find the maximum speed of proton
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questiona convex lens is a transparent device that uses refraction to twist and focus light from an object forming a
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