Exam-style question
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Calculate the energy of a photon emitted when an electron transitions from an energy level of 5.0 eV to 2.0 eV.
Model answer
What a good answer should say
- The energy of the photon emitted is 3.0 eV.
Explanation
Why this works
This question tests the ability to calculate photon energy from energy level differences using the formula E = E_initial - E_final. The working shows the correct substitution and calculation, leading to the final answer with appropriate units.
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