Question: If an electron in an atom makes a 2 . 7 8 eV energy transition and emits a photon, what is the photons wavelength? 2

If an electron in an atom makes a 2.78 eV energy transition and emits a photon, what is the photons wavelength?2. What is the energy transition in eV of a 632.8 nm photon from a HeNe laser?

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