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The title says it all: this blog features physics videos found everywhere on the web: animations, demonstrations, lectures, documentaries.
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Thursday, 6 October 2011

Field of a Sphere and an Infinite Plane

A Mylar balloon is held near a charged Van de Graaff generator. The balloon is moved radially away from the sphere and its deflection from the vertical is observed to decrease with distance. The same procedure is done with a conducting "infinite" plane. When the balloon is moved outwards from the plane, its deflection from the vertical remains constant. When the balloon is very far from the plane, edge effects conspire to decrease its deflection.

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