SAT Subject Physics Practice Question 615: Answer and Explanation

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Question: 615

11. This question relates to the electron energy level diagram below. The questions are about a hydrogen electron located at E3.

What is the absorbed energy when it moves to E5?

A. +66eV
B. +.98eV
C. -1.87eV
D. -10.2eV
E. +12.08eV

Correct Answer: B

Explanation:

The correct answer is (B). The electron absorbs -.98eV of energy to jump from level 3 to level 5 (E3 - E5). The energy is negative because it is absorbed by the electron as it rises closer to zero potential and a possible escape from the nucleus.

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