Question

Write the difference b/w emission and absorption spectrum.

Answer 1

Absorption spectrum:-
1) It is spectrum produced by absorption of radiation.
2) It is produced by excitation if electrons from lower to higher energy levels.
3)It contains dark lines on bright back ground.
4)The spectrum is dis continuous.
5) eg:- sodium vapour gives two dark lines at 5890A° and 5896A° in yellow region.
Emission spectrum:-
1) It is produced by emission of radiation.
2) It is due to excitation if electrons from higher to lower energy levels.
3) It contains bright lines on dark background.
4) The spectrum may be discontinues.
5)eg:- Sodium vapour gives two bright lines at 5890A° and 5896 A° in yellow region.