The shortest wavelength in the Lyman series of the hydrogen spectrum is $912 \ \mathring{A}$,corresponding to a photon energy of $13.6 \ eV$. The shortest wavelength in the Balmer series is about..... $\mathring{A}$.

Hydrogen atoms are excited from the ground state to the principal quantum number $n = 5$. The number of spectral lines observed will be:

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

The light emitted in the transition $n = 3$ to $n = 2$ (where $n$ is the principal quantum number of the state) in hydrogen is called $H_{\alpha}$-light. Find the maximum work function that a metal can have so that $H_{\alpha}$-light can emit photoelectrons from it. (in $\text{ eV}$)

Which of the following spectral series of the hydrogen atom lies entirely in the ultraviolet region?

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