Question

If an observer is moving away from the stationary source of sound, then apparent frequency is given by _________. ($f,V_s,V_0,C$ are frequency, velocity of source, velocity of observer and velocity of sound, respectively).

• A. $f\left[\frac{C-V_0}{C}\right]$
• B. $f\left[\frac{C+V_0}{C}\right]$
• C. $f\left[\frac{C}{C+V_0}\right]$
• D. $f\left[\frac{C}{C-V_0}\right]$

Answer 1

The correct option is A

$f\left[\frac{C-V_0}{C}\right]$

Correct option is A: $f\left[\frac{C-V_0}{C}\right]$

Explanation:

1. Doppler effect in physics is defined as the increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other.
2. If an observer is moving away from the stationary source of sound, then apparent frequency is given by $f\left[\frac{C-V_0}{C}\right]$.

Hence, option A is correct.