Light, the visible spectrum
r
frequency 75Q (THz*)
675
630
590
—1 r
525 510
460
380
wavelength 400 (nm*‘) | 445 I 475 I 510 I 570 I 590 I 650 I 780 I
photon 3.1 energy | 2.8 I 2.6 I 2.4 I 2.2 I 2.1 1.9 I 1.6 I
* In terahertz (THz); 1 THz = 1 x1012 cycles per second. '* In n