4.12 Infraredradiation detection Gamma and cosmic rays 10 101 102 Ultraviolet Infrared 10 Short radio waves 108 1010三 Commercial TV and FM radio 10 AM radio 1014 Long radio waves 16 1018 f(Hz)×(A)=3X1018A/s=3×108m/s Fig. 4.106 Electromagnetic radiation spectrumFig. 4.106 Electromagnetic radiation spectrum 4.12 Infrared radiation detection