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Thin Films



A high school student of mine asked when and why the thin film
interference effect stops working. If one looks into a transparent
container of oil no effect is seen but a thin film on a puddle shows a
definite interference pattern. How thick does the oil need to be to
lose the effect and what is the mechanism involved? Is it perhaps just
that too much absorption is taking place?

Thanks for any help on this. David Abineri

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David Abineri
dabineri@choice.net