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

When the electron in the hydrogen atom jumps from the $2^{nd}$ orbit to the $1^{st}$ orbit,the wavelength of the radiation emitted is $\lambda$. When the electron jumps from the $3^{rd}$ orbit to the $1^{st}$ orbit,the wavelength of the emitted radiation will be:

The ratio of the largest to shortest wavelengths in the Lyman series of hydrogen spectra is

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

If $R$ is the Rydberg constant for hydrogen,the wave number of the first line in the Lyman series will be

The series limit of the Lyman series is given by a wavenumber of ......