The spectral series observed for hydrogen atom found in visible region is

In hydrogen atom, if $\mathrm{V}_{\mathrm{n}}$ and $\mathrm{V}_{\mathrm{p}}$ are orbital velocities in $\mathrm{n}^{\text {th }}$ and $\mathrm{p}^{\text {th }}$ orbit respectively, then the ratio $\mathrm{V}_{\mathrm{p}}: \mathrm{V}_{\mathrm{n}}$ is

When a hydrogen atom is raised from the ground state to the excited state

In hydrogen atom, ratio of the shortest wavelength in the Balmer series to that in the Paschen series is