GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Colourless or white light as perceived by human eye actually consists of many colours or wavelengths of light. Shown here is the spectrum of white light emitted by an incandescent bulb filament. The spectrum was obtained by decomposing or spatially dispersing white light with a prism. Note that emission of the incandescent bulb covers visible spectrum continuously. Photo was digitally manipulated.
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