A Pair of Narrow Slits That Are 1

question 59

Multiple Choice

A pair of narrow slits that are 1.8 mm apart is illuminated by a monochromatic coherent light source.A fringe pattern is observed on a screen 4.8 m from the slits.If the wavelength of the monochromatic light is 450 nm,what is the angular separation between adjacent dark fringes on the screen,measured in milliradians?

• A)0.15 mrad
• B)0.20 mrad
• C)0.25 mrad
• D)0.30 mrad
• E)0.36 mrad

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