Sound with a frequency 650 Hz from a distant source passes through a doorway 1.10m wide in

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Sound with a frequency 650 Hz from a distant source passes through a doorway 1.10m wide in a sound-absorbing wall. Find the number and approximate directions of the diffraction-maximum beams radiated into the space beyond.
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Fundamentals of Physics

ISBN: 978-0471758013

8th Extended edition

Authors: Jearl Walker, Halliday Resnick

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