Light from a helium-neon laser 633 nm is used to


Question: What is the spacing (in mm) between the slits?

Light from a helium-neon laser (? = 633 nm) is used to illuminate two narrow slits. The interference pattern is observed on a screen3.3m behind the slits. Eleven bright fringes are seen, spanning a distance of 51mm.

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Physics: Light from a helium-neon laser 633 nm is used to
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