Two out of phase loudspeakers are some distance apart. A person stands 5.40 m from one speaker and 3.20 m from the other. What is the second lowest frequency at which constructive interference will occur? The speed of sound in air is 346 m/s.

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Q: 1. Two out of phase loudspeakers are some distance apart. A person stands 5.60 m from one speaker…

A: Speed of sound in air  v= 340m/s

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Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.