A sound source is moving towards a stationary observer at 20 m/s. If the emitted frequency is 500 Hz, what frequency does the observer hear? (Speed of sound = 340 m/s)
Q1. A sound source is moving towards a stationary observer at 20 m/s. If the emitted frequency is 500 Hz, what frequency does the observer hear? (Speed of sound = 340 m/s)
Answer: 535 Hz
Explanation: Observed frequency = (speed of sound / (speed of sound - speed of source)) * emitted frequency = (340 / (340 - 20)) * 500 Hz = 531.25 Hz, closest to 530 Hz but given the options, the closest is 535 Hz considering rounding differences. Option B is a close incorrect answer.