For a Diffraction Horn Loudspeaker,sound Emerges Through a Rectangular Opening

question 37

Multiple Choice

For a diffraction horn loudspeaker,sound emerges through a rectangular opening.The opening of a diffraction horn has a width of 0.12 m.If the speaker emits a continuous tone with a wavelength of 0.09 m,at what angle does the first minimum occur?

• A)47°
• B)39°
• C)23°
• D)12°
• E)66°

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