AP Physics 2
14.8 Double-Slit Interference and Diffraction Gratings
14.6 Wave Interference and Standing Waves
Coherent monochromatic light of wavelength \(\lambda\) passes through two narrow slits, \(S_1\) and \(S_2\), separated by a distance \(d\), and illuminates a distant screen. Point \(P\) is the location of the first dark fringe (first interference minimum) above the central bright maximum. Which of the following diagrams best represents the path length difference \(\Delta L\) and the spatial phase relationship of the two waves as they arrive at point \(P\)?
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