MHT CET · Physics · Waves and Sound
A source of sound emits sound wave of frequency ' \(f\) ' and moves towards an observer with a velocity \(\frac{\mathrm{V}}{3}\) where V is the velocity of sound. If the observer moves away from the source with a velocity \(\frac{\mathrm{V}}{5}\) the apparent frequency heard by him will be
- A \(\frac{15}{2} f\)
- B \(\frac{8}{15} \mathrm{f}\)
- C \(\frac{6}{5} \mathrm{f}\)
- D \(\frac{15}{18} \mathrm{f}\)
Answer & Solution
Correct Answer
(C) \(\frac{6}{5} \mathrm{f}\)
Step-by-step Solution
Detailed explanation
\(f' = f \left( \frac{V - v_o}{V - v_s} \right)\) \(f' = f \left( \frac{V - \frac{V}{5}}{V - \frac{V}{3}} \right)\)
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