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Two very narrow slits are spaced 1.81 μm and are placed 36.0 cm from a screen....

Two very narrow slits are spaced 1.81 μm and are placed 36.0 cm from a screen. What is the distance between the first and second dark lines of the interference pattern when the slits are illuminated with coherent light with a wavelength of 545 nm? (Hint: The angle θ in equation dsinθ=(m+12)λ is not small.)

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