Double-Slit Interference: Coherent Monochromatic Light of Wavelength 632

question 16

Multiple Choice

Double-slit interference: Coherent monochromatic light of wavelength 632.8 nm passes through a pair of thin parallel slits. The figure shows the central portion of the pattern of bright fringes viewed on a screen 1.40 m beyond the slits. What is the distance between the two slits?

• A) 0.0703 mm
• B) 0.141 mm
• C) 0.281 mm
• D) 0.562 mm
• E) 0.633 mm

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