JAMB Physics 2021 Objective — Question 23
Question 23 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2021 Objective paper, with the correct answer and a full explanation.
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Sound wave (85.5 Hz, 343 m/s) reflected from wall. Distance from wall to first antinode:
- A. 1 mCorrect
- B. 2 m
- C. 3 m
- D. 4 m
Explanation
λ=343/85.5≈4 m; first antinode at λ/4=1 m from wall.
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