A Metallic Sheet Has a Large Number of Parallel Slits,5

question 30

Multiple Choice

A metallic sheet has a large number of parallel slits,5.0 mm wide and 20 cm apart.This sheet is used as a diffraction grating for microwaves.A wide parallel beam of microwaves is incident normally on the sheet.If the intensity maxima occur 2.0° apart in the central region,what is the wavelength of the microwaves?

• A)5.0 mm
• B)6.0 mm
• C)7.0 mm
• D)8.0 mm
• E)9.0 mm

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