Complete Experiment FOR

When an electric current is passed through a glass tube that contains hydrogen gas at low pressure,the tube gives off blue light. The emission spectrum of atomic hydrogen is divided into a
number of spectral series, with wavelength given by the Rydberg's formula. These observed spectral lines are due to electron making a transition between two energy levels of atom. The classification of the spectral series by using Rydberg's formula was important in the development of quantum mechanics as well as in astronomy for detecting the presence of hydrogen and calculating red shift. When the light of Hydrogen discharge tube is passed through on imported grating of 15000 lines/inch , on the both sides of central direct image, we obtain hydrogen spectrum for the first and second order consisting of violet, Blue, Blush green and red in visible region. The angle of diffraction are determined for these colors .

Our Rydberg's Constant experiment consists of following Apparatus

Spectrometer 6” Cat. No. 1588
• Spectral Tube Power Supply & Mount Cat.
No. 1638
• Spirit Level 2”
• Imported Grating 15000lines/inch Cat. No.
1650c
• Hydrogen Discharge Tube Cat. No. 1640d2Nos.