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12.Atoms
normal
The ratio of speed of an electron in ground state in Bohrs first orbit of hydrogen atom to velocity of light in air is
A
$\frac{{{e^2}}}{{2{\varepsilon _0}hc}}$
B
$\frac{{2{e^2}{\varepsilon _0}}}{{hc}}$
C
$\frac{{{e^3}}}{{2{\varepsilon _0}hc}}$
D
$\frac{{2{\varepsilon _0}hc}}{{{e^2}}}$
Solution
The ratio of speed of an electron in ground state in Bohrs first orbit of hydrogen atom to velocity of light in air is
$\frac{e^{2}}{2 \varepsilon_{0} h c}$
Standard 12
Physics
