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Light from a sodium lamp (λ=589nm)(λ=589nm) illuminates two narrow slits. The fringe spacing on a screen...

Light from a sodium lamp (λ=589nm)(λ=589nm) illuminates two narrow slits. The fringe spacing on a screen 150 cm behind the slits is 4.8 mm .

Part A

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

Express your answer using two significant figures.

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