Two Harmonic Waves Travelling in Opposite Directions Interfere to Produce $\pi$

question 19

Multiple Choice

Two harmonic waves travelling in opposite directions interfere to produce a standing wave described by y = 2 sin ( $\pi$ x) cos (3 $\pi$ t) where x is in m and t is in s. What is the distance (in m) between the first two antinodes?

• A)8
• B)2
• C)4
• D)1
• E)0.5

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