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A standing wave having 3 nodes and 2 antinodes is formed between two atoms having a distance $1.21 Å$ Å between them. The wavelength of the standing wave is
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$1.21 Å$
Key Idea The given standing wave has 2 segments.
The given standing wave is shown in the figure.
As length of one loop or segment is $\frac{\lambda}{2}$, so length of 2 segments is $2\left(\frac{\lambda}{2}\right)$. $\therefore \quad 2 \frac{\lambda}{2}=1.21 Å$
$\Rightarrow \quad \lambda=1.21 Å$
The given standing wave is shown in the figure.
As length of one loop or segment is $\frac{\lambda}{2}$, so length of 2 segments is $2\left(\frac{\lambda}{2}\right)$. $\therefore \quad 2 \frac{\lambda}{2}=1.21 Å$
$\Rightarrow \quad \lambda=1.21 Å$
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