A Bohr-like atom has a ground state energy (n=1) of -41.4eV. An electron makes a transition from the n=4 state to the n=2 state. The emitted photon is then incident onto a metal surface with a work function equal to 3.34eV. What is the wavelength (nm) of the emitted photon? HINT: Bohr-like atom means that the energy, En, of the n-th level scales as En=E1/n^2, where E1 is the ground state energy

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The Bohr model

Students often get confused between Rutherford’s model and Bohr model of an atom. They interpret the postulates of both these models to be the same, which is incorrect. Rutherford’s model differs from Bohr’s model in the following ways: