Word.ws English Dictionary

Kasha's rule

Kasha's rule proper noun: a principle in the photochemistry of electronically excited molecules, stating that photon emission (fluorescence or phosphorescence) occurs in appreciable yield only from the lowest excited state of a given multiplicity.

Proper noun

Kasha's rule

  1. A principle in the photochemistry of electronically excited molecules, stating that photon emission (fluorescence or phosphorescence) occurs in appreciable yield only from the lowest excited state of a given multiplicity.

Origin of Kasha's rule

Named after American spectroscopist Michael Kasha, who proposed it in 1950.

Questions about Kasha's rule

What does Kasha's rule mean?
Kasha's rule means a principle in the photochemistry of electronically excited molecules, stating that photon emission (fluorescence or phosphorescence) occurs in appreciable yield only from the lowest excited state of a given multiplicity.
What part of speech is Kasha's rule?
Kasha's rule is a proper noun.

Words near Kasha's rule in the dictionary

  1. Kash
  2. Kash.
  3. kasha
  4. kasha varnishkas
  5. kasha varnishkes
  6. Kasha's rule
  7. Kashag
  8. Kashan
  9. Kashani
  10. Kashanis
  11. Kashans

Source and license

Adapted from Wiktionary: Kasha's rule (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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