Transparent filmprojector is used to demonstrate interference, polarization and other wave optical phenomena and laws on large screen in big lecture halls.
本文介绍利用投影仪和透明胶片在大教室前的屏幕上动态演示干涉、偏振等波动光学现象及其规律的一些方法。
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The chief equipment of electrified education includes slide projector, overhead projector, filmprojector, tape recorder, television set, TV camera and so on.