PIRA: 6D20.20


Lab Equipment  Directions
  1.  File folder with slit
  2. 4″ x 4″ holographic grating in frame with stoppers for support
  3. overhead projector
  1.  Place the folder on the overhead and focus.
  2. Hold the holographic grating over the top lens of the projector. You should see a light spectra to each side of the slide.