The radius of the second Bohr orbit for hydrogen atom is: (Planck's Const. h =6.6262 × 10^-34 Js; mass of electron =9.1091 × 10^-31 kg; charge of…

The radius of the second Bohr orbit for hydrogen atom is : (Planck's Const. $\displaystyle \mathrm{h}=6.6262 \times 10^{-34} \mathrm{Js}$; mass of electron $\displaystyle =9.1091 \times 10^{-31} \mathrm{~kg}$; charge of electron $\displaystyle \mathrm{e}=1.60210 \times 10^{-19} \mathrm{C}$; permittivity of vacuum $$\left.\epsilon_0=8.854185 \times 10^{-12} \mathrm{~kg}^{-1} \mathrm{~m}^{-3} \mathrm{~A}^2\right) $$