Determine the separation of the two slits

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Reference no: EM13714278

Question: Light of wavelength 690nm falls on two slits and produces an interference pattern in which the third-order bright red fringe is 40mm from the central fringe on a screen 2.0m away.

Part A: What is the separation of the 2 slits?

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Please help for the above question, totally confused!! Show each steps if possible, Thanks.

Reference no: EM13714278

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