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

Options

A. `(1)/(2)`
B. `(2)/(237)`
C. `(1)/(137)`
D. `(2)/(137)`

Answer

C

Explanation

`v_(n)=2.2xx10^(6) (Z)/(n)m//sec`
`v_(1)=2.2xx10^(6) m//sec`
`(v_(1))/(c )=(2.2xx10^(6))/(3xx10^(8))=(1)/(137)`