$\definecolor{red}{RGB}{255,0,0}$$\definecolor{black}{RGB}{0,0,0}$
$n$
$n$
$n$
$r$
$r$
$r$
$$\color{blue}{\rightarrow}\color{black}\;$$
$$r = \frac{n\cdot\lambda}{ 2\cdot\pi} $$
$\lambda(nm)$
$\lambda(nm)$
$\lambda(nm)$
$$\color{blue}{\rightarrow}\color{black}\;$$
$$\lambda(nm) = \frac{2\cdot\pi\cdot r}{n} $$
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Bohr's orbit radius, quantum number and electron wavelength
Numbers in the form 1/2 or 0.5 or 1.5E3 are accepted:
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