Excitation

Definition

Excitation occurs when an electron absorbs energy and moves to a higher energy level within an atom. This process is crucial in the formation of spectral lines observed in astronomy.

5 Must Know Facts For Your Next Test

1. Excitation can be caused by the absorption of photons or through collisions with other particles.
2. When an excited electron returns to a lower energy state, it emits a photon, resulting in an emission line.
3. The amount of energy absorbed during excitation corresponds to the difference between the electron's initial and final energy levels.
4. Each element has a unique set of energy levels, leading to characteristic spectral lines.
5. Understanding excitation helps astronomers determine the composition and physical conditions of astronomical objects.

Review Questions

Related terms

Photon:

A particle representing a quantum of light or other electromagnetic radiation.

Emission Line:

A bright line in a specific location of the spectrum formed by emission of photons from atoms.

Energy Level:

The fixed amount of energy that a system described by quantum mechanics can have.