Created by StemPy LabWhite light falls on a double slit, and at one point of the screen the path difference is . One colour of the visible spectrum is missing there, because it interferes destructively. What is its wavelength?
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← A teacher holds a card with two narrow slits in front of a lamp that gives light of wavelength 570 nm. A white wall 1.5 m behind the card shows a pattern of stripes. The cuts in the card are 0.45 mm apart. How wide is each bright stripe, from the middle of one to the middle of the next?A double-slit experiment in air gives a fringe width β. The whole apparatus is then put under a liquid of refractive index 1.35. Which change brings the fringe width back to β? →
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