An ambulance with its siren on is moving at a constant speed of 20 m The siren emits sound waves at a constant frequency. A stationary detector placed on the side
of the road records a frequency that is 50 Hz higher than the original frequency
Take the speed of sound in air as 340 ms

6.3 Calculate the wavelength of the sound emitted by the siren
Some of the sound waves are reflected from the detector back towards the
ambulance
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