I am trying to gain a better understanding of physics outside of my classes. As such, I decided to buy myself an optical prism to learn more about the spectrum of specific light sources, light filtering, etc. I just received my prism in the mail today, but am severely disappointed. When I was a child, I remember my parents having a prism, and that it was relatively easy to get a rainbow from sunlight. However, the prism that I received today doesn't seem to refract the light properly. It is extremely difficult to get even the slightest hint of a spectrum, and even then, it is very faint and at the edge of a large section of pure white light. I wasn't sure how reliable the reviews on the site were, but the company overall seemed to be ok from the research I did into them. This is the prism I bought: http://dx.com/p/optical-triple-triangular-glass-prism-spectrum-white-180238?Utm_rid=16222746&Utm_source=affiliate. I would appreciate your thoughts. One thing to note is that if I put my eye close to it and look at certain light sources, I can see a pretty good separation of the spectrum. For some reason though, it just doesn't seem to want to do the same when reflecting it onto a white surface. I am not sure if there are certain things in particular to look for in a prism, so any feedback on the matter would be appreciated.