Hey forum, could somebody tell me which formula this is

$\displaystyle \Delta \varphi = \frac{2 \pi}{\lambda_0}d \( | n_0 - n_e | \)$

$\displaystyle n_0$ is the ordinary index of refraction, I think.

Thanks!

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- Nov 8th 2011, 01:06 PMSweatingBearWhat formula is this?
Hey forum, could somebody tell me which formula this is

$\displaystyle \Delta \varphi = \frac{2 \pi}{\lambda_0}d \( | n_0 - n_e | \)$

$\displaystyle n_0$ is the ordinary index of refraction, I think.

Thanks!