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Two narrow slits are illuminated by a laser with a wavelength of 542 nm. The interference pattern...

Two narrow slits are illuminated by a laser with a wavelength of 542 nm. The interference pattern on a screen located x=5.10 m away shows that the fourth-order bright fringe is located y = 6.10 cm away from the central bright fringe. Calculate the distance between the two slits.


The screen is now moved 2.4 m further away. What is the new distance between the central and the fourth-order bright fringe? 

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Concept: use the equation for position of fringes on a screen in Young’s double slit experiment for solution

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