A vehicle with a horn of frequency n is moving with a velocity of 30m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n + n1. Then (if the sound velocity in air is 300 m/s)
A. n1 = 10 n
B. n1 = 0
C. n1 = – 0.1 n
D. n1 = 0.1 n
Answer:B
A vehicle with a horn of frequency n is moving with a velocity of 30m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n + n1. Then (if the sound velocity in air is 300 m/s)
A. n1 = 10 n B. n1 = 0 C. n1 = – 0.1 n D. n1 = 0.1 n