8 ●物體也會吸收電磁波 入射能量：E 反射0.03E 入射能量：E 反射0.9E lamp-black surface silver-coated surface ~0.97E 0.97E ~0.1E 0.1E absorbed emitted absorbed emitted ·Blackbody：完全吸收落於其上的電磁波 ) 電磁波的完全吸收體(perfect absorber) [A material that is a good EM wave absorber>also a good emitter L A material that is a poor EM waver absorber>also a poor emitter Blackbody同時是電磁波的 完全吸收體(perfect absorber)及 完全放射體(perfect emitter) 交源大擎李威熊 2012物理是想8 交通大學 李威儀 2012 物理異想 • Blackbody : 完全吸收落於其上的電磁波  電磁波的完全吸收體 ( perfect absorber ) Blackbody 同時是電磁波的 完全吸收體 ( perfect absorber ) 及 完全放射體 ( perfect emitter ) ~ 0.97 E absorbed lamp-black surface 入射能量 : E 反射 0.03E ~ 0.1 E absorbed silver-coated surface 入射能量 : E 反射 0.9E 0.97E emitted 0.1E emitted A material that is a good EM wave absorber  also a good emitter A material that is a poor EM waver absorber  also a poor emitter • 物體也會吸收電磁波