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9-3/8" X 7-3/8" OPTICAL GLASS SPECTRUM & POLARIZING DEMONSTRATION PLATES
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Item No: L3692
Price: $25.00
or 10 for $199.00
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| These are great and very unique! They work exactly like polarizing sheets but instead of just getting darker the plates change to different colors of the spectrum. These are 2mm thick, not sure what type of optical glass they are but they look like a neutral density filter (when not paired). May have been used on an LCD screen of some sort. Price is for a set of 2. Used one way, they are polarizing plates. Flip them over and you can show the whole spectrum! Rotate one against the other to see the polarizing or spectrum effects. An amazing value! While supplies last! |
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