I recently published a blog on how to scientifically interpret what different fingerprint patterns indicate in terms of personality traits.
You can check that blog out here: Intimate Science
A question came up about how to view fingerprints, so here is a demonstration of how to very simply view fingerprints with great contrast.
This makes for a great party trick and if you combine it with a little scientific interpretation as in the blog linked above, you should get your 15 minutes of fame.
I was considering going into some detail about why the light is doing what it does in this video, but it gets a little involved with frustrated total internal reflection, index of refraction and light propagation concepts, so the easier thing is just to play around with different lighting angles and see what happens, it couldn't be less expensive to experiment with. One hint is to note that wherever my finger is not touching the glass, the glass looks dark - there is no reflection there.
Have fun with this and check out the Intimate Science link for an interesting application.
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