The radius of the orbit of an electron in a Hydrogen like atom is \...

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The radius of the orbit of an electron in a Hydrogen like atom is \( 4.5 a_{0} \), where \( a_{0} \) is the Bohr radius. Its orbital angular momentum is \( \frac{3 h}{2 \pi} \). It is given that \( h \) is Planck's constant and \( R \) is Rydberg constant. The possible - wavelength(s), when the atom de-excites is/are
- (a) \( \frac{9}{32 R} \)
(b) \( \frac{9}{16 R} \)
(c) \( \frac{9}{5 R} \)
(d) \( \frac{4}{3 R} \)
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