Principle
The spectral lines of hydrogen and mercury are examined by means of a diffraction grating. The known spectral lines of Hg are used to determine the grating constant. The wave lengths of the visible lines of the Balmer series of H are measured.
Tasks



Determination of the diffraction grating constant by means of the Hg spectrum.
Determination of the visible lines of the Balmer series in the H spectrum, of Rydberg’s constant and of the energy levels.



What you can learn about

Diffraction image of a diffraction grating
Visible spectral range
Single electron atom
Atomic model according to Bohr
Lyman-, Paschen-, Brackett and Pfund Series
Energy level
Planck’s constant
Binding energy