Question

In Bohr's model of the hydrogen atom the ratio between the period of revolution of an electron in the orbit of n = 1 to the period of the revolution of the electron in the orbit n = 2 is –

• A. 1 : 2
• B. 2 : 1
• C. 1 : 4
• D. 1 : 8

Answer 1

Answer: (D)

1 : 8

Answer 2

$\frac{T_{1}}{T_{2}} = \frac{n_{1}^{3}}{n_{2}^{3}} = \frac{1^{3}}{2^{3}} = \frac{1}{8}$.

$\therefore \left( T = \frac{2\pi r}{V} \right)$ so, $T \propto \frac{n^{3}}{Z^{2}}$