1.基本知识 .All objects in the Universe emit light depending on their temperature:物体温度决定其辐射波长 ◆低温物体：辐射主要分布在长波区间 Human ◆高温物体：辐射主要分布在短波区间 SPECTRAL CLASS Infrared 33°C(306K) Electric Stove SURFACE TEMPERATURE 0 B AFGK M 30,000 25,000 20,000 15,000 10,000 5,000 Kelvins Red Light 4,130°C(4,400KInfrared 33° C (306 K) Red Light 4,130° C (4,400 K) Electric Stove Human 1. %&'( u All objects in the Universe emit light depending on their temperature,-./01234567 u 23456789:;<=>?@A u B3456789:;<=C?@A