SAT Subject Physics Practice Question 380: Answer and Explanation
1. Question below relates to the following chart, which is a partial energy level diagram for the hydrogen electron.
The question relates to a hydrogen electron located at E-3. What is the emission energy when theelectron falls to E-2 from E-3?
Correct Answer: C
The correct answer is (C). The solution to the problem is found by ΔE = E3 - E2. The calculation yields +1.89 eV. The positive sign tells us the electron releases energy as it falls to a lower energy level.