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A standing wave having 3 nodes and 2 ant...

A standing wave having 3 nodes and 2 antinodes is formed between two atoms having a distance 1.21Å between them. The wavelength of the standing wave is

A

1.21 Å

B

2.42 Å

C

0.605 Å

D

4.84 Å

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The correct Answer is:
A
Therefore `lamda = 1.21Å`
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