The lines in the atomic spectrum of hydrogen are due to:

In Bohr’s model, if the atomic radius of the first orbit is ${r_0}$, then the radius of the fourth orbit is

The wavelength of the first line of the Lyman series for hydrogen is approximately 121.6 nm. What is the wavelength of the second line?

The third line of Balmer series of an ion equivalent to hydrogen atom has wavelength of $108.5\,\,nm$. The ground state energy of an electron of this ion will be

Which of the following is true

The spectral series of the hydrogen atom that lies in the visible region of the electromagnetic spectrum

The first member of the Paschen series in hydrogen spectrum is of wavelength $18,800\,\,{A^0}$. The short wavelength limit of Paschen series is

The wavelength of the first line of Balmer series is $6563\,\,{A^0}$. The Rydberg constant for hydrogen is about

Excitation energy of a hydrogen like ion in its first excitation state is $40.8\,\,eV$. Energy needed to remove the electron from the ion in ground state is

The limiting line in the Balmer series of hydrogen corresponds to a transition from $n = \infty$ to $n = 2$. What is the wavelength of this line? (Rydberg constant, $R = 1.097 imes 10^7 m^{-1}$)

In an atom for the electron to revolve around the nucleus, the necessary centripetal force is obtained from the following force exerted by the nucleus on the electron