A Fraunhofer Diffraction Pattern Is Produced from a Light Source

question 34

Multiple Choice

A Fraunhofer diffraction pattern is produced from a light source of wavelength 460 nm.The light goes through a single slit and onto a screen 0.9 m away.The first dark fringe is 4.5 mm from the central bright fringe.What is the slit width? (1 nm = 10−⁹ m)

• A)1.8E-4 m
• B)9.2E-5 m
• C)3.1E-5 m
• D)1.4E-4 m
• E)2.0E-2 m

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