If `a_(0)` be the radius of first Bohr's orbit of H-atom, the de-Broglie's wavelength of an electron revolving in the second Bohr's orbit will be:

What is the de-Broglie wavelength of an electron with kinetic energy of 120 eV?

Calculate the number of waves made by a Bohr electyron in one complete revolution in n ^(th) orbit of H-atom, if ratio of de-Broglie wavelength asssociated with electron moving in n^(th) orbit and 2^(nd) orbit is 1.5.

What is the momentum and De Broglie wavelength of an electron with kinetic energy of 120 eV.