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>In preparation for a demonstration about the index of refraction, I
>placed several "ghost crystals" in distilled water as per the directions
>included with the crystals. They have expanded greatly in size and are
>clear, just as expected.
>
>The problem is that there are tiny air bubbles trapped in the crystals,
>so they are not completely invisible.
>
>Has anyone else had this problem in preparing them? Any insight will be
>greatly appreciated.
I have never heard of these, but it would seem prudent to deair the
water by boiling before using it if you are having this problem.
Leigh