In Young's experiment, the light source is a brightly illuminated narrow slit S in the screen A (Fig.). The light from it falls on the second opaque screen B, in which there are two identical narrow slits S1 and S2, parallel to S. The slits S1 and S2 are at a small distance from each other and are coherent light sources. Interference is observed on screen C, parallel to screen B and located at a distance l from it, and l>> d. The interference pattern is an alternation of light and dark stripes (maxima and minima) parallel to each other. Find the distance between two adjacent maxima if it is known that d = 0.2 mm, l = 2 m, light wavelength λ = 500 nm.
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