6F30.11 - Diffraction Grating Light Spectrum
To show the dispersion of white light through a thick diffraction grating.
Shine the projector light at the surface of the thick diffraction grating that is placed on top of a wooden block. Have the pattern display on the wall at an angle from the projector.
Turn on the projector and observe the dispersion of the white light through the thick diffraction grating. You should see a repeating rainbow of colors.