Multiple choice general knowledge math & puzzles

An excited atom decays to its ground state and emits a photon of green light. If instead, the atoms decays to an intermediate state, then the light emitted could be:

  1. Violet

  2. White

  3. Blue

  4. Red

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Energy of an emitted photon is proportional to the frequency. A transition to an intermediate state involves a smaller energy drop than a transition to the ground state. Since red light has lower energy/frequency than green light, it is the only plausible option among the choices.