Here, r_{n} is the radius of the nth orbit which is distance of the electron in the nth orbit from the nucleus.

n= the number of orbit, ϵ_{0} is the permittivity of the free space, h is Planck’s constant, m is the mass of the electron and e is the charge on the electron. All these quantities are constant and hence the value of the quantity in the brackets is also constant. The calculated value of this constant is 0.592 A^{0}.

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