Bohr S Model For Hydrogen Atom

In the hydrogen atom, the energy of the electron in the orbit is given by: The wavelength of the emitted photon when the electron transitions from an upper orbit to a lower orbit can be found using the relation: The energy of the photon is related to the wavelength by the equation: where is Planck's constant and is the speed of light. For the transition from the 3rd orbit to the 2nd orbit, the energy difference is: The wavelength of the emitted photon for this transition is: For the transition from the 2nd orbit to the 1st orbit, the energy difference is: The wavelength of the emitted photon for this transition is:
Thus, the wavelength of the photon emitted when the electron jumps from the second to the first orbit is .