In Bohr’s model of the hydrogen atom, electrons in “stationary” orbits do not emit radiation continuously because:

In Bohr’s model of the hydrogen atom, electrons in stationary orbits do not emit radiation continuously because they are restricted to certain discrete orbits where their angular momenta are quantized. In these orbits, electrons have definite, quantized energies and do not lose energy by radiation while moving in these fixed orbits. Radiation or absorption of energy occurs only when an electron jumps between two stationary states, which explains the discrete spectral lines of hydrogen. Thus, the correct answer is (A) .