Atomic excitation

Definition

Atomic excitation occurs when an electron in an atom absorbs energy and moves to a higher energy level. This process is fundamental in understanding atomic spectra and various applications in physics.

5 Must Know Facts For Your Next Test

1. Atomic excitation requires the absorption of a photon with energy exactly equal to the difference between two energy levels.
2. The excited state of an atom is typically unstable, leading to de-excitation where the electron returns to a lower energy level.
3. De-excitation often results in the emission of a photon, which can be observed as spectral lines.
4. Atomic excitation is crucial in technologies such as lasers, fluorescent lights, and understanding stellar spectra.
5. The probability of atomic excitation occurring depends on factors like the intensity and wavelength of incident light.

Review Questions

Related terms

Photon: A quantum of electromagnetic radiation with energy proportional to its frequency.

Energy Levels:

Discrete values of energy that electrons in an atom can have.

Spectral Lines:

Emission or absorption lines seen in a spectrum, corresponding to specific wavelengths associated with electronic transitions.