Sound WavesHardBloom L3
Question
A car moves towards a hill with speed vc. It blows a horn of frequency f which is heard by an observer following the car with speed v0. The speed of sound in air is v.
Options
A.the wavelength of sound reaching the hill is$\frac{v}{f}$
B.the wavelength of sound reaching the hill is $\frac{v - v_{c}}{f}$
C.the beat frequency observed by the observer is $\left( \frac{v + v_{0}}{v - v_{c}} \right)f$
D.the beat frequency observed by the observer is$\frac{2v_{c}(v + v_{0})f}{v^{2} - v_{c}^{2}}$
Solution
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