Word: projectors
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...would be too pat, too sentimental in its pessimism for this icy-eyed film maker. He was obsessed with the morality of social ambition, but he preserved those obsessions in a medium, and an oeuvre, that should outlive all those who mourn his death. The camera is stilled. The projector keeps clicking. The burnout burns bright. -By Richard Corliss
Purcell also showed how a rocket launches and what the gas argon would like like from the viewpoint of a molecule using polaroid transparencies and an overhead projector...
Simple demonstrations can illustrate profound concepts in physics, Nobel-prize winning physicist Edward M. Purcell--who called the overhead projector "the greatest invention since chalk"--told a small crowd in the Science Center yesterday...
Using a tennis racquet, a cardboard box and an overhead projector, Purcell, Gade University Professor Emeritus, demonstrated that light is transmitted in waves rather than particles, and other basic theories of physics...
...have never seen anything change a teaching situation as drastically and abruptly as the overhead projector," Purcell said to the group of teachers in the last three presentations in the Professional Training Series sponsored by the Harvard-Danforth Center for Teaching and Learning...