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Questions  

The ratio of the speed of the electrons in the ground state of hydrogen to the speed of light in vacuum is

a
1 / 2
b
2 / 137
c
1 / 137
d
1 / 237

detailed solution

Correct option is C

Speed of electron in nth orbit of hydrogen atomv=e22εonhIn ground state n=1⇒v=e22εonh⇒vc=e22εonh=1.6×10−1922×8.85×10−12×3×103×6.6×10−34=1137

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