Khan Academy Static

Turn an old CD into a spectroscope to analyze light—you may be surprised by what you see. Try pointing your CD spectroscope at the fluorescent light in your room, sunlit clouds in the sky (but never the sun), even your friend’s colored shirt to reveal the wavelengths of light that mix together to create the color you see. It's your very own truth teller for light!

17256_Introduction_Turn_an_old_CD_into_a_spectroscope_to_analyze_light_and_color.html

17259_What_s_going_on_Spreading_light_into_a_spectrum.html

17257_Build_your_own_CD_spectroscope_Materials_tools_and_steps.html

17258_To_do_and_notice_See_the_true_colors.html