State two necessary conditions for a stationary wave to be set up on a string.
State the principle of superposition.
A stationary wave is made up of nodes and anti–nodes.
Define what is meant by a:
(i) node
(ii) anti–node
Figure 1 shows a stationary wave on a string fixed at both ends.
Figure 1
Label on Figure 1 the nodes (N) and anti–nodes (A).
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