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Title: A double slit that is illuminated with coherent light of wavelength 644 nm produ Post by: mnm88 on Jul 22, 2014 A double slit that is illuminated with coherent light of wavelength 644 nm produces a pattern of bright and dark fringes on a screen 6.00 cm from the slits. If the slits are 2783 nm apart, what is the distance on the screen between the 4th and the 2nd bright fringes on one side of the central maximum? a). 23.0 cm b). 11.5 cm c). 17.6 cm d). 14.7 cm e). 3.13 cm
Title: Re: A double slit that is illuminated with coherent light of wavelength 644 nm produ Post by: Physics Rules on Jul 23, 2014 You'll need to determine the fringe separation for two maxima, using the relation for fringe separation from constructive interference. With that said, the fringe separation between m=2 and m=4 is around 2.8 cm, which is closest to choice e.
Title: Re: A double slit that is illuminated with coherent light of wavelength 644 nm produ Post by: mnm88 on Jul 23, 2014 That's exactly what I've gotten! I thought I was doing it incorrectly since it did not match any answer choice.
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