Which emission transition series is obtained when an electron jumps from $n_2 = \infty$ to $n_1 = 1$?

Which properties characterize electromagnetic radiation?

Explain the reason for the formation of a spectrum.

The Vijayawada $FM$ radio station broadcasts at a frequency of $103.4 \ MHz$. The wavelength of the corresponding radio waves (in $m$) is

Which color in the visible spectrum has the maximum energy? Provide its energy,wavelength,and frequency.

In the visible spectrum,which color,violet or red,undergoes greater refraction? Why?