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Introduction to Waves

if the speed ...

Question

if the speed of a wave in air 400 m/s and time period of the oscillation is 10 mili second. Find it's frequency and wavelength

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Solution

Given, v = 400 m/s
T = 10 millisecond = 0.01 s
Since, frequency, $ν$ = 1/T = 1/0.01 = 100 Hertz
Since, v = $ν$ λ
hence, wavelength λ = v/ $ν$ = 400/100 = 4 m

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