Physics - Modern Physics Question with Solution | TestHub

Maximum possible different spectral lines for transition from $\mathrm{n}=6$ to $\mathrm{n}=1$ is 6, if only those transitions are allowed for which change in principle quantum number is even.

If mass of electron was twice the present value, radius of 1st orbit of H-atom according to Bohr's model would be $0.265\mathring{\mathrm{A}}$

Absorption spectrum of a hydrogen atom at room temperature has lesser no. of spectral lines as compared to emission spectrum.

If photons of emission spectrum of H-atom falls on a photosensitive material having work-function of 2.6 eV, then maximum kinetic energy of photo-electrons would be 11eV.