H2P-609

Energy levels and line spectra

H2 Physics · JC 2 · Medium · Energy levels and line spectra

An electron in an atom makes a transition from an energy level at −1.5 eV to a lower level at −4.0 eV. Using

E = hf

, where

h = 6.63 \times 10^{-34}

J s and

1\,\text{eV} = 1.60 \times 10^{-19}

J, calculate the frequency of the emitted photon.

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