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Science
What is faster electricity or light?
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Tricky question: All electromagnetic energy moves at lightspeed, about 300,000,000 m per sec., in a vacuum. In a medium, like glass or copper, this speed is less, due to resistance -- but it is still "lightspeed". So electricity in a wire moves at lightspeed, but a slower lightspeed than in vacuum.
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In most cases, light travels faster than electricity. However, there are cases where a medium, such as water, slows down light enough that electricity can overtake it, producing a glowing effect called Cherenkov radiation.
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