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Atoms of lithium are able to absorb photons of frequency 2.01 x 1014 Hz. This corresponds to a transition state from the ground state (at -5.37 ev) to an excited state. Zero energy corresponds to the state in which one electron is completely removed from the atom. (Use h = 4.14 x 10-15 ev s and c = 3.0 x 108 m/s).

a) What is the energy of the excited state referred to in the passage?

b) What is the wavelength of light corresponding to this transition?

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