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Which ONE of the statements below about the Doppler effect is CORRECT? A. The Doppler effect is only applicable to sound waves. The Doppler effect

Which ONE of the statements below about the Doppler effect is CORRECT? A. The Doppler effect is only applicable to sound waves. The Doppler effect can be used to explain the expanding universe. Electrons are ejected from a metal surface by means of the Doppler effect. D. A stationary listener hears a lower pitch of the sound from a siren of an approaching vehicle because of the Doppler effect. B. C. (2) Which ONE of the following is NOT an application of the Doppler effect? A. A light meter. B. A blood flow meter. C. Detecting the heartbeat of a foetus using ultrasound. Measuring the speed of an approaching car using radar. n (2)

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