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An idea shared by Eddie on speed of light barrier

If 24 lights in a series around a circle are wired so that each one switches on as soon as it “sees” the one next to it go on, and switches off as soon as it “sees” the one next to it go off, will the pattern of lights revolve around the circle at a speed close to the speed of light?

In a pn junction, if diffusion current equals drift current, then why is there a potential barrier?

“In a [wiki]pn junction[/wiki], if diffusion current equals drift current, then why is there a potential barrier?”

Ans: When a [wiki]diode [/wiki]conducts, there is no [wiki]potential barrier[/wiki]

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