The number of spectral lines emitted by atomic hydrogen that is in the 4th energy level, is
(2) 6
[figure]
Lines = n(n-1)2= 4 32=6
4 3, 4 2, 4 1, 3 2, 3 1, 2 1
Answer: (2)
The frequency of revolution of the electron in Bohr's orbit varies with n, the principal quantum number as:
During the transition of electron from state A to state C of a Bohr atom, the wavelength of emitted radiation is 2000 and it becomes 6000 when the electron jumps from state B to state C. Then the wavelength of the radiation emitted during the transition of electrons from state A to state B is
An electron in the ground state of the hydrogen atom has the orbital radius of 5.3 10-11 m while that for the electron in third excited state is 8.48 10-10 m. The ratio of the de Broglie wavelengths of electron in the ground state to that in the excited state is