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- Thread starter kira506
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UltrafastPED

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Thus polarization is wrt the electric field; so is phase.

If two waves are in phase (phase difference is zero) then they constructively interfere; if they are out of phase by pi radians (180 degrees) they interfere destructively. And all other cases are intermediate.

In optics the phase difference can be calculated with the "optical path length", or OPL. So if you have two paths you calculate the OPL for each one, and their difference is the OPD="optical path difference". From the OPD you can determine the expected phase shift.

The OPL is the geometric distance x index of refraction; if these are varying along the way you chop up the path and apply the corresponding index of refraction.

They march through all of the theory and calculations for the Michelson interferometer here:

http://www.physics.umanitoba.ca/undergraduate/phys2260/Lectures/Intro Optics - PPT v2part 04.pdf

Also see http://en.wikipedia.org/wiki/Optical_path_length

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Thus polarization is wrt the electric field; so is phase.

If two waves are in phase (phase difference is zero) then they constructively interfere; if they are out of phase by pi radians (180 degrees) they interfere destructively. And all other cases are intermediate.

In optics the phase difference can be calculated with the "optical path length", or OPL. So if you have two paths you calculate the OPL for each one, and their difference is the OPD="optical path difference". From the OPD you can determine the expected phase shift.

The OPL is the geometric distance x index of refraction; if these are varying along the way you chop up the path and apply the corresponding index of refraction.

They march through all of the theory and calculations for the Michelson interferometer here:

http://www.physics.umanitoba.ca/undergraduate/phys2260/Lectures/Intro Optics - PPT v2part 04.pdf

Also see http://en.wikipedia.org/wiki/Optical_path_length

Thanks alot , that really halped especially that i'm familiar with these terms , now I get the OPD and its relation to the phase of the wave

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So they occur simultaneously but the periodic time differs ? So by saying that they occur simultaneously , you mean that do occur at the same time and space but this may change along their path and they'd be still in phase ? (Sorry for the trouble , i understand stuff slowly and thanks btw for the aforementioned information )

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