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Sound waves of frequency 600 H(Z) fall n...

Sound waves of frequency `600 H_(Z)` fall normally on perfectly reflecting wall. The distance from the wall at which the air particles have the maximum amplitude of vibration is (speed of sound in air = `330 m//s`)

Text Solution

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The correct Answer is:
A, B
Wall will be a node (displacement). Therefore,
shortest distance from the wall at which air
particles have maximum amplitude of vibration
(displacement antinode) should be `lambda/4`.
Here, `lambda = v/f = 330/660 = 0.5 m `
`:. Desired distance is `0.5/4 = 0.125 m`.
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