Answer:
Range of the visible spectrum
colour* wavelength (nm) frequency (1014 Hz) energy (eV)
*Typical values only.
red (limit) 700 4.29 1.77
red 650 4.62 1.91
orange 600 5.00 2.06
yellow 580 5.16 2.14
green 550 5.45 2.25
cyan 500 5.99 2.48
blue 450 6.66 2.75
violet 400 7.50 3.10
