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Old May 2nd 2009, 11:30 PM   #1
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fringes of equal inclination/thickness?

Can anyone explain to me their differences and relation?

thanks!
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Old May 6th 2009, 09:16 PM   #2
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It can be talking something about soap bubble producing non-uniform interence pattern. It is because the thickness of upper region of soap bubble is very thin with path differnece amlost zero due to pull by gravity.
The non-uniform thickness results in non-uniform fringes.

In essence, the relationship can be described by the following equation.
$\displaystyle 2nt = m\lambda$ or $\displaystyle 2nt=(k-0.5)\lambda$

where $\displaystyle t$ is the thickness of film of material between
$\displaystyle \lambda$ being the wavelength

n ,m and k being constants
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