Diffraction Gratings and the Hydrogen Spectrum
BlackBoard Notes

======================= Photo - Click for a Larger Version =============================

======================= First Board Section =============================

• Today's Mission:
  • Part I: Calibrate the grating
  • Part II & III: Measure H wavelengths
    • {Applies to both previous entries} Have your values checked as soon as they are calculated! Redo as necessary!
• Next week (or on your own!):
  • Part IV: Draw energy level diagram, calculate actual λ's, finish journal

======================= Second (LARGE) Board Section =============================

(Draw the following pics side-by-side)

• Calibrating the grating:

• Handle the grating with care!

(Write the following below both pics)

• Lights ON:
  • Part I & II
• ALL lights OFF (No Later Than 3:00 p.m.!):
  • Part III

• ---

• Note: I need to put the following picture in the instructions. If I have, then this does not need to be written on the blackboard
• Angle calculated from spectrometer readings (part III, step 6):
  • 
• Why not a simple average? θ_{n = 0} ≠ 0°!
  • 

======================= Third Board Section =============================

• Important Notes:
  • Don't disturb the spectrometers until you've been shown their operation.
  • Leave H lamp turned OFF until ready to measure.
  • Print today's instructions so you won't have your laptop open when using the spectrometer

Return to Setup

©	St. Lawrence University	Department of Physics

Revised: 30 May 2023

Canton, NY 13617