Exam-style question
Try this first
Which of the following best describes photon emission?.
- A.It occurs when electrons gain energy
- B.It occurs when electrons lose energy
- C.It is independent of energy levels
- D.It requires external energy input
Model answer
What a good answer should say
- It occurs when electrons lose energy
Explanation
Why this works
Photon emission occurs when electrons transition to lower energy levels, resulting in the release of energy as photons.
Common mistake
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