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3. Red light with wavelength 680 nm passes through a pair of slits with a separation...

3. Red light with wavelength 680 nm passes through a pair of slits with a separation of 61 microns. 3a). Find the scattering angle corresponding to the first bright fringe. 3b). If the diffraction pattern is projected onto a screen a distance L = 11 meters away, what is the separation g on the screen between the unscattered beam and that first bright fringe?

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