KCET2008PhysicsWaves and Sound
With what velocity should an observer approach a stationary sound source, so that the apparent frequency of sound should appear double the actual frequency? ( is velocity of sound).
Options
- Av 2
- B3 v
- C2 ~V
- DNone of these
Correct answer
D. None of these
Step-by-step solution
By using gathered v^ =v [ v-v₀ v-v_ s ] 2 v=v [ v-v₀ v-0 ] gathered v _ o =- v . Negative sign indicates that observer is moving opposite to the direction of velocity of sound.