Photon
Photon
Agenda today 1.Photon:the particle nature of radiation 2.Blackbody radiation 3.photoelectric effect 4.Compton effect
Agenda today 1. Photon: the particle nature of radiation 2. Blackbody radiation 3. photoelectric effect 4. Compton effect
Blackbody radiation(黑体辐射) Blackbody is a body that would absorb all the radiation falling on it Radiation intensity of blackbody (单色辐出度) Energy of electromagnetic waves of wavelength from 入to入+d入by unit surface e(2,T)= dE of blackbody in unit time dλ interval
Blackbody radiation(黑体辐射） Blackbody is a body that would absorb all the radiation falling on it Radiation intensity of blackbody （单色辐出度） Energy of electromagnetic waves of wavelength from to +d by unit surface of blackbody in unit time interval
A good emitter is also a good absorber
A good emitter is also a good absorber
e亿 The rate of radiation 1700K (总辐出度) 1500K The energy emitted by unit area of surface per unit 1300K time 1100K E(T)=()da 0123 4 (同 Stefan-Boltzmann equation E(T)=OT4 Stefan constant:o =5.6703x10 (W.m 2.K4)
0 1 2 3 4 The rate of radiation （总辐出度） The energy emitted by unit area of surface per unit time. Stefan-Boltzmann equation 4 Eo (T) o T Stefan constant: