The work function of a metal $M$ is $6.3 \ eV$. The wavelength of the incident radiation required to just eject the electrons from its surface (in $nm$) is

When an electron jumps from $L$ to $K$ shell,what happens to the energy?

If the energy of the electron in a hydrogen atom in some excited state is $-3.4 \ eV,$ then what will be its angular momentum?

When an electron jumps from $n = 5$ to $n = 2$ with all possible transitions,which of the following statements is correct?

The energy of the first (lowest) Balmer line of the $H$ atom is $x \ J$. The energy (in $J$) of the second Balmer line of the $H$ atom is:

The wavenumber of the first spectral line of the Lyman series of $He^{+}$ ion is $x \ m^{-1}$. What is the wavenumber (in $m^{-1}$) of the second spectral line of the Balmer series of $Li^{2+}$ ion?