MDCAT Chemistry MCQ #904

A student observes bright lines on a dark background in a spectrometer. Which phenomenon explains this observation?

MDCAT Chemistry MCQ #904

  1. Question 1

    Q1. A student observes bright lines on a dark background in a spectrometer. Which phenomenon explains this observation?

    • A) Absorption of light by gaseous atoms
    • B) Emission of light by excited electrons
    • C) Refraction of light through a prism
    • D) Scattering of light by colloidal particles

    Answer: Emission of light by excited electrons

    Explanation: Emission spectra occur when electrons drop to lower energy levels. Option A describes absorption spectra, which show dark lines.