MDCAT Physics MCQ #310

MDCAT Physics MCQ #310

1. Question 1

   Q1. Why do absorption spectra show dark lines at the same wavelengths as emission spectra for a given element?

   • A) Atoms absorb and emit photons at identical energies due to energy conservation.
   • B) Absorption and emission are opposite processes with reversed energy gaps.
   • C) Photon-electron interactions cancel energy differences.
   • D) Quantum tunneling synchronizes absorption and emission.

   Answer: Atoms absorb and emit photons at identical energies due to energy conservation.

   Explanation: Energy conservation links absorption and emission wavelengths. Option B is incorrect because energy gaps are identical in magnitude.