ACTION IS PRACTICALLY INSTANTANEOUS

CD 1963101 E&MP 25.041

Electric Lamps

11-25-30

Lighting a 1000-watt lamp with a match. Light from the demonstrator's match starts a current in a photoelectric cell, which in turn permits a current to pass through the thyratron tube (large tube in the center).

The thyratron then allows the current to pass through the 1000-watt lamp, lighting it. But all this takes much less time to happen than for you to read about it, for the action is practically instantaneous.

Original Caption by Science Service
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