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Optics
Young's double slit
Two coherent slits interfere to give evenly spaced bright fringes — Δy = λL/d. Widen d and the fringes crowd together.
Simulate Young's double-slit interference and measure fringe spacing. Change wavelength and slit separation to explore wave optics and constructive interference.
Open the interactive simulation to build the scene, press Play, and explore with live measurements and a guided tutorial.