Ultraviolet Rays Walvelength usually between 10--450nm
UV-V : 390-450nm
UV-C :200-280nm short wavelength
UV-B:280-315nm middle wavelength
UV-A:315-400nm long wavelength
Ultraviolet light has many applicatation especially in UV-A type which widely used
in food, electronics, semiconductors, crystal vibrators, chemicals, medicine, health care, agriculture ...