# Can a charged black hole interact via electromagnetism? [duplicate]

Possible Duplicate:
Detection of the Electric Charge of a Black Hole

Light cannot escape from a black hole. However light is also interpreted as the carrier of the electromagnetic force. So how can a charged black hole interact via electromagnetism with its environment? Can one see from the outside of a charged black hole, that this black hole is actually charged? Or is this information hidden, because light (and therefore information about the electric charge) cannot escape from the black hole?

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