Block, SkipCaptcha
8,517
edits
Changes
Jump to navigation
Jump to search
Line 1:
Line 1: − The theory of '''Light''' refers to [[electromagnetic]] [[radiation]] of any [[wavelength]], or to EM radiation of visible wavelengths <ref>Wavelengths of EM spectrum <i>usbyte.com</i> [http://www.usbyte.com/common/approximate_wavelength.htm]</ref> ; that stimulate the [[organ]]s of sight, having for normal human vision wavelengths ranging from about 3900 to 7700 [[ångstrom]]s (390 to 780 [[nm]]), violet has the shortest wavelength and red has the largest.+
Undo revision 621847 by ChuckTimton (Talk) no theory
'''Light''' can refer to [[electromagnetic]] [[radiation]] of any [[wavelength]], or to EM radiation of visible wavelengths <ref>Wavelengths of EM spectrum <i>usbyte.com</i> [http://www.usbyte.com/common/approximate_wavelength.htm]</ref> ; that stimulate the [[organ]]s of sight, having for normal human vision wavelengths ranging from about 3900 to 7700 [[ångstrom]]s (390 to 780 [[nm]]), violet has the shortest wavelength and red has the largest.
It travels at the [[speed of light]]: about 186,300 [[mile]]s (300,000 kilometres) per second.
It travels at the [[speed of light]]: about 186,300 [[mile]]s (300,000 kilometres) per second.