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A light source emits visible light of two wavelengths: ? = 430 nm and ?' =...

A light source emits visible light of two wavelengths: ? = 430 nm and ?' = 510 nm. The source is used in a double-slit interference experiment in which a viewing screen is separated from a double-slit source by a length (L) of 2.80 m and the distance between the two slits (d) is 0.0450 mm. Find the value of y (in m) on the screen at which the fringes from the two wavelengths first coincide.

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