A long air column is open at both ends

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

A 0.80 m0.80\,\text{m} long air column is open at both ends. It resonates in its second overtone. How far from one end of the tube is the nearest displacement antinode located? (a) 0.40 m0.40\,\text{m} (b) 0.13 m0.13\,\text{m} (c) 0.27 m0.27\,\text{m} (d) 0.20 m0.20\,\text{m}

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