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Which of the following transitions in a hydrogen atom emits the photon of highest frequency?

1. n = 2 to n = 1
2. n = 2 to n = 6
3. n = 6 to n = 2
4. n = 1 to n = 2

Correct answer: n = 2 to n = 1

Solution

The frequency of the emitted photon is directly proportional to the energy difference between the two levels. The transition from n = 2 to n = 1 has the largest energy difference, resulting in the highest frequency photon.

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