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April 16, 2014

Homework Help: Physics

Posted by Alphonse on Thursday, November 29, 2012 at 8:35pm.

In an interference of light experiment, coherent light that contains two wavelengths: 640 nm (red-orange) and 425 nm (indigo-blue), passes through two narrow slits separated by 5.35 μm, and the interference pattern is observed on an observation screen 2.51 m away.   (1 μm = 1×10-6 m, 1 nm = 1×10-9 m.)

What is the linear separation on the screen between the third bright fringes produced by the two wavelengths on one side of the central bright fringe in the experiment?  (in meters)
 
Note:  There is no need to make a small angle approximation here: you can calculate what you need directly.

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