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I haven't contributed anything to this group in a long time, but thanks to an improvement in my physical health I feel inspired to do so again. This won't be deep physics, but it is interesting, especially for teachers going back into classrooms tomorrow.
It is interesting to note that the package in which the glasses were handed out says:
NOT SAFE FOR USE AS SUNGLASSES
These glasses do not screen ultraviolet
light. Wearing them as sunglasses will not
protect your eyes. Use only in the theater.
Keep out of reach of children under 3."