SAT Subject Physics Practice Question 616: Answer and Explanation
12. This question relates to the electron energy level diagram below. The questions are about a hydrogen electron located at E3.
What is the emission energy when it moves to E1?
Correct Answer: E
The correct answer is (E). The electron emits +12.08eV of energy, which is equal to the difference between E3 - E1 . The energy is positive because it is emitted as the electron falls closer to the nucleus