The Doppler effect: Putting it all together
Detecting speed of baseball A Doppler speed meter operating at exactly 1.02 x 105 Hz emits sound waves and detects the same waves after they are reflected from a baseball thrown by the pitcher. The receiver “mixes” the reflected wave with a small amount of the emitted wave and measures a beat frequency of 0.30 x 105 Hz. How fast is the ball moving?
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