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Planck's Quantum Hypothesis

The orbital v...

Question

The orbital velocity of electron in the ground state is $υ$ . If the electron is excited to energy state -0.54eV,

A

$υ$

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B

$\frac{υ}{3}$

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C

$\frac{υ}{5}$

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D

$\frac{υ}{7}$

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Solution

The correct option is C
$\frac{υ}{5}$

$E_{n} = - \frac{13.6}{n^{2}} o r n^{2} = - \frac{13.6}{- 0.54} o r n^{2} = 25.2 o r n = 5 (nearly) No, v_{n} = \frac{v}{5}$

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