A sound wave of frequency $170$ Hz travels in air at $340$ m s$^{-1}$. Find its wavelength.
A$2$ mCORRECT
B$170$ m
C$57800$ m
D$0.5$ m
JUPEBPhysicsWaves and Optics
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Why the answer is A, and why the others tempt you.
$v = f\lambda$, so $\lambda = \dfrac{v}{f} = \dfrac{340}{170} = 2$ m. Inverting the ratio gives 0.5 m.
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