Hydrogen spectral series (Lyman, Balmer, Paschen)
A hydrogen discharge tube viewed through a spectroscope: the Lyman, Balmer, Paschen, Brackett and Pfund lines from 1/λ = R(1/n² − 1/m²), with the visible Balmer lines at 656, 486, 434 and 410 nm and the series limits.
About this experiment
| Subject | Physics |
|---|---|
| Class | 12 |
| Chapter | 12. Atoms |
| NCERT section | 12.5, 12.6 |
| Level | NCERT level |
| Time | about 12 minutes |
| Access | Included in a PractiSci plan |
What you do in the lab
Change the controls and watch the physics behave in real time in 3D. Live readouts and graphs show the numbers behind it, and the Learn tab has the theory, procedure, observations and viva questions. Works on a phone or a laptop, in English and Hindi.
Topics: hydrogen spectrum · Balmer series · Rydberg formula · spectral lines · series limit