Consider standing waves that are reflecting between two identical boundaries. If the distance between the boundaries is increased by a distance ΔL, what value of ΔL/λ will add one additional node (and antinode) to the standing wave pattern? (Assume that the wave velocity and frequency are unaffected by the change in distance.)

Principles of Physics: A Calculus-Based Text
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Chapter13: Mechanical Waves
Section13.7: The Doppler Eff Ect
Problem 13.6QQ: Consider detectors of water waves at three locations A, B, and C in Active Figure 13.23b. Which of...
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Consider standing waves that are reflecting between two identical boundaries. If the distance between the boundaries is increased by a distance ΔL, what value of ΔL/λ will add one additional node (and antinode) to the standing wave pattern? (Assume that the wave velocity and frequency are unaffected by the change in distance.) 

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