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Black Holes And Destructive Interference

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Posted by Stefan on August 28, 2000 08:51:11 UTC

Itīs a common question in scientific message boards: "Does destructive interference violate the law of conservation of energy?"
The standard answer is no. Thereīs no way to realize complete destructive interference. Itīs always accompanied by constructive interference.
Let us now assume the following:
Light is transmitted tangential in an appropriate distance to a black hole, so that it travels around it. (see picture ). Then another light beam is transmitted, so that itīs phase shift is lambda/2 if it reaches the first light beam. Will this result in a completely destructive interference?

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