The ratio of the wavelengths of the first line of the Lyman series and the first line of the Balmer series in the hydrogen spectrum is:

In hydrogen atom, electron makes transition from $n = 4$ to $n = 1$ level. Recoil momentum of the $H$ atom will be

The energy of electron in the nth orbit of hydrogen atom is expressed as${E_n} = \frac{{ - 13.6}}{{{n^2}}}eV$. The shortest and longest wavelength of Lyman series will be

Which of the following is NOT a characteristic of line spectra of atoms?

Number of spectral lines in hydrogen atom is

The wavelength of the energy emitted when electron comes from fourth orbit to second orbit in hydrogen is $20.397\,\,cm$. The wavelength of energy for the same transition in $H{e^ + }$ is

In hydrogen atom, if the difference in the energy of the electron in $n = 2$ and $n = 3$ orbits is $E$, the ionization energy of hydrogen atom is

Orbital acceleration of electron is

Which series of the hydrogen spectrum corresponds to transitions to the n=1 energy level?

If ${\lambda _{\max }}$ is $6563\,\,{A^0}$, then wavelength of second line for Balmer series will be

In hydrogen atom, the electron is moving round the nucleus with velocity $2.18 imes {10^6}\;{\rm{m}}{{\rm{s}}^{ - 1}}$ in an orbit of radius $0.528\;{A^0}$. The acceleration of the electron is