Three glasses - a curiosity

[mknittle]

Maybe the back surface of the glass is acting the way a lens does? projecting a inverted image on the front surface.

[Andrew1]

Gee, all this info is almost like,,,,,,basic photography stuff.

[dem]

Note that George's diagram and the one of Mark are showing the same thing - refraction.

Here is the explanation of the phenomenon:
http://www.physicscentral.com/experi...ing-arrows.cfm

and some more examples:
http://guidetodrawing.com/transparency/distortions/

[TonyW]

You can get the answer by elaborating on George's drawing of the ray between the object and the camera but Marks idea is also correct. The front glass is like a fat convex lens.

[thegman]

Nice shot Tony, as you said maybe not ''technically'' perfect but it got a discussion started. Well done

[rachel]

I humbly feel it is a case of concave mirror formation on the inner surface, reflecting the color on the opposite side....
(suffering total internal reflection)

Thanks for that diagram - we're going to try to recreate that in the lab with a laser or laser pen.

[Wavelength]

Thanks; please share the results too