Ultraviolet rays can be separated into three different wavelengths.
UVA,UVB and UVC. this way they can be differentiated due to their wavelengths and the amount of energy they contain.
UVA contains the least amount of energy and a smaller wavelength. UV-A radiation passes the earth's atmosphere almost unfiltered. As both UVB and UVA rays can be detrimental to our health, it is important that we protect ourselves.
UVC contains the highest amount of energy and a bigger wavelength. When the uv rays enters earth's ozone, UVC does not reach the earth's surface because of the ozone layer, the UVC bonds are broken up due to its oxygen particles breaking down when in contact with the ozone.