Q.

The distance between node and adjacent antinodes is 30 cm. The wavelength is -

A. 30 cm.
B. 90 cm.
C. 120 cm.
D. 60 cm.
Answer» D. 60 cm.
Explanation: A node is a point along a standing wave where the wave has minimal amplitude. The opposite of a node is an anti-node, a pointwhere the amplitude of the standing wave is a maximum.
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