WAEC Physics 2022 Objective — Question 15
Question 15 of 50 from the West African Examinations Council (WAEC) Physics 2022 Objective paper, with the correct answer and a full explanation.
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The periodic rise and fall in the intensity of sound produced when two notes of nearly equal frequencies are sounded together is called
- A. doppler effect
- B. beatCorrect
- C. interference
- D. resonance
Explanation
This phenomenon — periodic rise and fall in the intensity of sound from two notes of nearly equal frequency — is called a beat.
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