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Re: [Phys-l] A demo for biologists?



ludwik kowalski wrote:

Suppose a glass plate is replaced by a thin film stretched over a hole, in a rigid frame. Suppose one half of the hole is also covered with the second thin film. In this case cyclic darkening will probably be absent. Do you agree?
I expect that given fairly smooth plastic film the visible fringes
would be disturbed but probably not entirely destroyed by incoherence.

Brian W