A Double Slit Is Illuminated with Monochromatic Light of Wavelength

question 18

Multiple Choice

A double slit is illuminated with monochromatic light of wavelength 6.11 × 10² nm. The m = 0 and m = 1 bright fringes are separated by 1.8 cm on a screen which is located 3.5 m from the slits. What is the separation between the slits?

• A)4.0 × 10^-5 m
• B)8.0 × 10^-5 m
• C)1.2 × 10^-4 m
• D)1.6 × 10^-4 m
• E)2.4 × 10^-4 m

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