MDCAT Physics MCQ #421

A light source emits a spectrum with multiple spectral lines. What is the origin of these spectral lines?

MDCAT Physics MCQ #421

  1. Question 1

    Q1. A light source emits a spectrum with multiple spectral lines. What is the origin of these spectral lines?

    • A) Thermal motion of atoms
    • B) Electron transitions
    • C) Nuclear reactions
    • D) Gravitational waves

    Answer: Electron transitions

    Explanation: Spectral lines in a light source spectrum are primarily caused by electron transitions.