Ultraviolet light is part of the electromagnetic that has a wavelength shorter than that of the violet end of the visible spectrum but longer than that of X-rays. The frequencies are higher than those that humans see as the color violet.
Ultraviolet light is placed into categories of A and B depending on the wavelength and frequency. This lesson uses a hand held piece of equipment called a LabQuest made by Vernier Scientific. Attached to the LabQuest is a UVB probe that senses ultraviolet light (UVB).
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