A standing wave having three antinodes and four nodes is formed between two atoms having a dista...

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A standing wave having three antinodes and four nodes is formed between two atoms having a distance of \( 2 A^{\circ} \) between them. The wavelength of the standing wave
\( P \) is
(A) \( 1.33 \mathrm{~A}^{\circ} \)
(B) \( 6 \mathrm{~A}^{\circ} \)
WV
(C) \( 1.4 \mathrm{~A}^{\circ} \)
(D) \( 8 \mathrm{~A}^{\circ} \)
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