List of top Physics Questions on The Line Spectra of the Hydrogen Atom asked in CUET (UG)

The ratio of maximum wavelength to minimum wavelength in Balmer series is
At what speed should a galaxy move with respect to earth so that spectral line of 600.0 nm appears as 600.6 nm?
What is the wavelength of light for the least energetic photon emitted in the Lyman series of the hydrogen atom spectrum lines?
(Take h=6.63×10-34Js; c=3×108 ms-1; e=1.6×10-19C)