Fun Fact of the Day, February 13, 2019

February 13, 2019

The Edison Effect - On this day in 1880, Thomas Edison discovers the Edison Effect.  Thomas Edison noticed that heating certain materials could cause them to emit electrons that could be attracted to an electrode held at a positive potential with respect to the emitter, especially when the electrodes were in a vacuum. This became known as the Edison effect and according to Edison, was discovered by accident when experimenting with his new invention, the incandescent lamp. Twenty years later, this effect became the basis for inventing the vacuum tube.

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