• View Balmer series using hydrogen light source, diffraction
  grating, and optics rail.

Location

• Optics rail parts: L02, section B6
• Spectrometer grating (small one, in above photo): L35, section A5
• Spectrometer grating (large, hand-held, good for demos): L02, section C1
• Spectral tubes and power supply: L35, section G1