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Two narrow slits are illuminated by a laser with a wavelength of 517 nm. The interference...

Two narrow slits are illuminated by a laser with a wavelength of 517 nm. The interference pattern on a screen located x = 5.50 m away shows that the fourth-order bright fringe is located y = 9.40 cm away from the central bright fringe. Calculate the distance between the two slits.

The screen is now moved 1.7 m further away. What is the new distance between the central and the fourth-order bright fringe?

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