Kirchhoff’s Laws
•Relate continuous spectra, emission line spectra, &
•                       absorption line spectra
1.Luminous solid (dense gas) emits light of all wavelengths ® continuous spectrum of radiation
2.Low density hot gas emits spectrum of bright emission lines ® composition of gas
3.Low density cool gas absorbs wavelengths from continuous spectrum ® dark absorption lines on continuous spectrum (wavelengths same as emission lines from hot gas)
4.