In my defense, the one we used during my last 2 years of parochial school (Junior High)...We had one that was reflective, rather than transmissive. Very bright light and very hot, but you could project non-translucent images and objects. Space-Age shit right there, man!
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PedroHin Come along & ride on a Flantastic Voyage,
Sun 16 May 2021, 16:39,
archived)
Yeah those colour graphs were amazing.Good Times Good Times
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atomic A-bomb-a-nation,
Sun 16 May 2021, 16:46,
archived)