'''Light''' can refer to electomagnetic radiation of any wavelength, or to EM radiation of visible wavelengths; that stimulate the [[organ]]s of sight, having for normal human vision wavelengths ranging from about 3900 to 7700 ångstroms and traveling at a speed of about 186,300 miles per second. On the first [[day]], God created light; [[God]] said ''Let there be light,'' and there was light. | '''Light''' can refer to electomagnetic radiation of any wavelength, or to EM radiation of visible wavelengths; that stimulate the [[organ]]s of sight, having for normal human vision wavelengths ranging from about 3900 to 7700 ångstroms and traveling at a speed of about 186,300 miles per second. On the first [[day]], God created light; [[God]] said ''Let there be light,'' and there was light. |