If a source of solid is moving; a stationary listener will hear a sound of different frequency. This is called? by Sunday | Mar 25 | Physics JAMB | 0 comments A. doppler effect B. resonance C. ultra sound D. rarefaction Correct Answer: Option A – doppler effect Users Also Read These:Why do you do such thing? For I hear of your evil…The sound heard by a person after the reflection of…How far from a cliff should a boy stand in order to…A source of sound produces waves in air of…As the air column of length L in an air pipe…