Difference between revisions of "Excitation"
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*The [[atom]] remains [[Neutral Charge|neutral]] as the [[electron]] is not removed from the [[atom]]. | *The [[atom]] remains [[Neutral Charge|neutral]] as the [[electron]] is not removed from the [[atom]]. | ||
*The excited state is usually unstable, and the [[electron]] will soon return to a lower [[Energy Level|energy level]], [[emit]]ting [[energy]] in the form of a [[photon]]. | *The excited state is usually unstable, and the [[electron]] will soon return to a lower [[Energy Level|energy level]], [[emit]]ting [[energy]] in the form of a [[photon]]. | ||
| − | *'''Excitation''' is important in understanding the [[ | + | *'''Excitation''' is important in understanding the the [[Absorption Spectra|absorption]] and [[Emission Spectra|emission spectra]] of [[atom]]s and the operation of LASERs. |
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===Examples=== | ===Examples=== | ||
*[[Neon]] signs glow due to the '''excitation''' of [[Neon]] [[atom]]s and subsequent [[Emit|emission]] of light. | *[[Neon]] signs glow due to the '''excitation''' of [[Neon]] [[atom]]s and subsequent [[Emit|emission]] of light. | ||
*[[Fluorescent]] lamps work by '''exciting''' [[Mercury (Element)|Mercury]] vapor, which then [[emit]]s [[ultraviolet]] [[Visible Light|light]] that causes the [[phosphor]] coating to glow. | *[[Fluorescent]] lamps work by '''exciting''' [[Mercury (Element)|Mercury]] vapor, which then [[emit]]s [[ultraviolet]] [[Visible Light|light]] that causes the [[phosphor]] coating to glow. | ||
Revision as of 10:10, 30 May 2024
Key Stage 5
Meaning
Excitation is the process in which an atom absorbs energy without ionizing, causing an electron to move from a lower to a higher energy level.
About Excitation
- Excitation occurs when an electron absorbs a photon or energy from a collision and jumps to a higher energy level.
- The atom remains neutral as the electron is not removed from the atom.
- The excited state is usually unstable, and the electron will soon return to a lower energy level, emitting energy in the form of a photon.
- Excitation is important in understanding the the absorption and emission spectra of atoms and the operation of LASERs.
Examples
- Neon signs glow due to the excitation of Neon atoms and subsequent emission of light.
- Fluorescent lamps work by exciting Mercury vapor, which then emits ultraviolet light that causes the phosphor coating to glow.