Problem 17.11

Light from a helium-neon laser (wavelenght = 633 nm) is used to illuminate two narrow slits. The interference pattern is observed on a screen 3.0 m behind the slits. Thirteen bright fringes are seen, spanning a distance of 52 mm .

Part A -

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

Express your answer using two significant figures.

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