Double-Slit Interference: in a Double-Slit Experiment, the Slit Separation Is

question 81

Multiple Choice

Double-slit interference: In a double-slit experiment, the slit separation is 2.0 mm, and two wavelengths, 750 nm and 900 nm, illuminate the slits simultaneously. A screen is placed 2.0 m from the slits. At what distance from the central maximum on the screen will a bright fringe from one pattern first coincide with a bright fringe from the other?

• A) 1.5 mm
• B) 3.0 mm
• C) 4.5 mm
• D) 6.0 mm
• E) 9.0 mm

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