Five blocks of glass. The prisms decompose light to give the colors of the spectrum.
Bought at Banggood: https://www.banggood.com/search/dichroic.html
https://en.wikipedia.org/wiki/Prism
https://en.wikipedia.org/wiki/Prism_spectrometer
https://en.wikipedia.org/wiki/Theory_of_Colours
Channel Page: http://www.youtube.com/user/mopatin/
Google + : http://www.google.com/+mopatin
