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:

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.

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-?Utm_rid=&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.

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Optical Glass Prisms

These are a series of Prisms made from Borosilicate Crown Glass. Absolutely clear, they refract light in interesting ways, and may be used dispersively to separate white light into its constituent colors, their most familiar property.

Prisms work on the principle that light changes speed and angle as it passes through different materials, a fact demonstrated when we see that a stirrer appears crooked when half-immersed in water. The angle of refraction differs between wavelengths of light, and can therefore spread the various colors (corresponding to different wavelengths) which make up white light into a rainbow of different hues.

In addition to their optical properties, these prisms are just attractive as objects, and make a nice set for a mantelpiece or windowsill as well as a classroom. We have been getting requests for prisms for some time, and we are happy to be able to offer these high-quality pieces!

Each of these prisms is an equilateral triangle in section and the pieces differ only in length (in millimeters), except for the Right-Angle prism. The ends are ground glass.

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DETAILS

SKU: HD-DS
Dimensions: Glass Prism, 50mm Hypotenuse 45mm, (2")
Glass Prism, Equilateral, 50 x 25mm, (2" x 1")
Glass Prism, Equilateral, 75 x 25mm, (3" x 1")
Glass Prism, Equilateral, 100 x 25mm, (4" x 1")
Glass Prism, Equilateral, 150 x 25mm, (6" x 1")
Origin: Canada
Shipping Restrictions: None.

HD-DSGlass Prism, 50mm Hypotenuse 45mm, (2")Glass Prism, Equilateral, 50 x 25mm, (2" x 1")Glass Prism, Equilateral, 75 x 25mm, (3" x 1")Glass Prism, Equilateral, 100 x 25mm, (4" x 1")Glass Prism, Equilateral, 150 x 25mm, (6" x 1")CanadaNone.

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