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Coherent light of wavelength 525 nm passes through two thin slits that are 4.15 x 10-2 mm apart and then falls on a screen 75.0 cm away.

1. How far away from the central bright fringe on the screen is the fifth bright fringe (not counting the central bright fringe)?

2. How far away from the central bright fringe on the screen is the eighth dark fringe?

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