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The Visible Spectrum
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absorbed absorption adjusted angle arc lamp arrangement audience beam of light blue and violet blue rays blue-green bright carbon caused cells chemical substances Christmas lectures chromatic aberration colour vision colours seen condensing lenses cone converged cornea crystalline lens diffraction grating disk distance effects electric arc electric arc lamp example eyeball fall fixation fluorescent focused glass prism green rays haemoglobin halo heat heat-rays intensity lantern screen large number layers light rays means metal method mirror nerve Newton Newton's rings objects optical orange parallel beam particles pass patch photographic piece pigment plant Polaroid position prism purple receptors red rays reflected refracted retina rings rods rotated Section sheet shown in Fig shown in Plate soap bubble soap film solution spectra spectral colours spectrum produced suitable surface Thomas Young transmitted trough ultra-violet ultra-violet rays usually violet rays visible rays wavelength white light X-rays yellow yellow-green