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AP Physics 2
14.8 Double-Slit Interference and Diffraction Gratings
14.7 Diffraction
AdvancedMCQMathematicalProportional AnalysisConceptual18.6k
A physical setup diagram showing horizontal plane wave fronts of light of wavelength \(\lambda\) traveling toward a vertical opaque barrier containing two rectangular slits. Each slit has width \(a\), and the distance between the centers of the two slits is labeled \(d = 4a\). To the right of the barrier, a vertical line representing a distant viewing screen is located at distance \(L\). No light rays, interference curves, or intensity envelopes are drawn between the barrier and screen. No other labels, lines, text, or axes appear.
Double-slit arrangement with slit width \(a\) and separation \(d = 4a\).
Monochromatic laser light of wavelength \(\lambda\) is incident normally on a double-slit system. Each slit has a width \(a\), and the center-to-center separation between the slits is \(d = 4a\). The resulting intensity pattern on a distant screen displays double-slit interference fringes modulated by the single-slit diffraction envelope. Which of the following correctly identifies the interference order \(m\) of the first missing maximum and the total number of bright interference fringes contained within the central diffraction envelope?

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