The human eye responds to electromagnetic radiation in the wavelength range from about 360 nanometers (violet) to 820 namometers (red), with a peak sensitivity near 555 nanometers.
Light





Wavelength
----------------
Luminous Flux

0.000004
0.000012
0.000039
0.000120
0.000396
0.001210
0.004000
0.011600
0.023000
0.038000
0.060000
0.090980
0.139020
0.208020
0.323000
0.503000
0.710000
0.862000
0.954000
0.994950
1.000000
0.995000
0.952000
0.870000
0.757000
0.631000
0.503000
0.381000
0.265000
0.175000
0.107000
0.061000
0.032000
0.017000
0.008210
0.004102
0.002091
0.001047
0.000520
0.000249
0.000120
0.000060
0.000030
0.000015
0.000007
0.000004
0.000002
0.000001
Nanometer

360
370
380
390
400
410
420
430
440
450
460
470
480
490
500
510
520
530
540
550
555
560
570
580
590
600
610
620
630
640
650
660
670
680
690
700
710
720
730
740
750
760
770
780
790
800
810
820