Electromagnetic Spectrum: Project the Spectrum with a Prism

Photo Shows the Apparatus Used at the University of Texas at Austin.

Instructions / Notes:

• Turn on the lamp to project a white light spectra onto the wall in two places.
• The slide projector contains a slide which has narrow upright slit opening at the center.

Demo Staff:

• It's difficult to see it in the second photo - but there is a good sized C-clamp on the table to prevent the projector from sliding off the rear.
• Ideally, the projector needs to be placed a good distance from the wall adjacent to the chalkboard - which usually means blocking one of the end seats in the first row.
• This placement of the slide projector allows the audience to view two spectra/rainbows simultaneously - (one on the near wall by the chalkboard and a second on the side wall on the opposite side of the classroom).

Photo Shows the Apparatus Used at the University of Texas at Austin.

Last updated on April 20, 2023