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24-05-2024
Physics

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Coherent light of frequency 6.4\times 1014Hz passes through two thin slits and falls on a screen 91 cm away. You observe that the third bright fringe occurs at \pm 3.2 cm on either side of the central bright fringe. (speed of light = 3 \times 108 m/s)
(a) How far apart are the two slits?

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