Question

A sound source is moving towards a stationary listener with \( \frac{1}{10} \)th of the speed of sound. The ratio of apparent to read frequency is:

• A. \( \left( \frac{9}{10} \right)^2 \)
• B. \( \left( \frac{10}{9} \right) \)
• C. \( \left( \frac{11}{10} \right)^2 \)
• D. \( \left( \frac{10}{9} \right)^2 \)

Hint:

For a sound source moving towards the observer, the frequency observed increases, and the ratio is given by the Doppler effect formula.

Answer 1

The Correct Option is B