The division used by Isaac Newton, in his color wheel, was: red, orange, yellow, green, blue, indigo, and violet ; a mnemonic for this order is “Roy G. Biv”.
Read moreWhat are the 7 types of wavelengths?
The electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays .
Read moreWhat are the six visible colours of the spectrum?
Newton originally divided the spectrum into six named colors: red, orange, yellow, green, blue, and violet .
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