𝐏𝐎𝐒𝐓 𝐄𝐈𝐆𝐇𝐓 Dispersion of White Light "𝙍𝙞𝙘𝙝𝙖𝙧𝙙 𝙤𝙛 𝙔𝙤𝙧𝙠 𝙜𝙖𝙫𝙚 𝙗𝙖𝙩𝙩𝙡𝙚 𝙞𝙣 𝙫𝙖𝙞𝙣" R-O-Y-G-B-I-V is a mnemonic used to remember the order of the colors in a rainbow : Red Orange Yellow Green Blue Indigo Violet