50.7 MB (8.5 MB compressed)
5156 x 3437 pixels
43.7 x 29.2 cm ⏐ 17.2 x 11.5 in (300dpi)
PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY
Ultraviolet light. Light used to produce ultraviolet (UV) light. These lamps, also known as black light, have a violet filter material, either on the bulb or in a separate glass filter in the lamp housing, which blocks most visible light and allows through UV.
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