Post-UTME Physics 2015 Objective — Question 2
Question 2 of 20 from the Post-UTME Screening (Post-UTME) Physics 2015 Objective paper, with the correct answer and a full explanation.
Advertisement
What happens when excited electrons in an atom return to lower energy levels?
- A. They absorb photons
- B. They emit protons
- C. They emit photonsCorrect
- D. They absorb neutrons
Explanation
When an excited electron falls to a lower energy level, it emits a photon carrying the energy difference.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.