Spectral Line Experiment
Complete before lecture starts at 2:05!
Get a diffraction grating
...a series of mini-prisms acting as one big prism
Look at a bright light to find the rainbow off to the side.
Look at Hydrogen & Helium gas discharge
...see their characteristic spectral emission lines?
- diffraction grating discoveryof absorption lines
As you exit, be sure to hand in your grating