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        Laser Waterfall

        Learn about total internal reflection in this video from the Encyclopedia of Physics Demonstrations. A laser beam is aligned so that the light passes through a water tank and out through an opening. As water flows out of the opening, observe how the laser beam remains trapped in the water stream because of total internal reflection. See how the light follows the path of the water even when the flow changes.

        This media asset is from The Video Encyclopedia of Physics Demonstrations.

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