Image »Quantized Angular Momentum, Radius, and Velocity in the Bohr Model.« download
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The angular momentum \( L_{\class{red}{n}} \) in the Bohr model of the atom can only be a multiple of Planck's constant \( \hbar \). The circular orbits have fixed radii \( r_{\class{red}{n}} \) and the electrons have a fixed velocity \( v_{\class{red}{n}} \) on these circular orbits.
