Two very narrow slits are spaced 1.80 μm apart and are placed 35.0 cm from a screen. Wha...

Two very narrow slits are spaced 1.80 μm apart and are placed 35.0 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 λ = 550 nm? (Hint: The angle θ in Eq. (35.5) is not small.)