PIRA: 6F10.26


 Lab Equipment  Directions
  1.  File folder with slit
  2. ruler-plastic slat
  3. 4″x4″ holographic grating in frame with stoppers for support
  4. overhead projector
  1.  Place the grating in front of the lends on the OHP.
  2. Place the file folder near the back of the platform with the slit running lengthwise on the OHP.
  3. Place the ruler in line with the slit, but at the front of the OHP platform.
  4. Observe and compare the upper spectra (RGB) and lower subtractive colors (CMY) seen on the projection screen.