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Why do lights turn on right away even though the electrons don't go the speed of light?
Wiki User
∙ 14y ago
The circuit does have a lag between the switch closing and the light going on; it is just imperceptible to humans. When the circuit is completed, all of the electrons begin moving at once. So those in the light are being moved and encountering resistance, then releasing energy, as soon as the switch is closed. So the light goes on as soon as it is. You may be thinking of "electron drift." Individual electrons move within the wire much more slowly than the electrical impulse does. You can think of it sort of like a long tube stuffed full of ping-pong balls: if I push a ping-pong ball into one end of the tube, a ping-pong ball emerges from the other end of the tube immediately, even though the tube may be pretty long and any individual ball doesn't move very fast.
Wiki User
∙ 14y ago
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