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Photon in Irish (Fótón): Meaning, Pronunciation, Usage

The Irish for photon is fótón, a masculine noun (plural fótóin).
Updated October 2026Report a mistake

How to say “photon” in Irish

Irish:
fótón
English:
photon
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“FOH-tohn”  /ˈfˠoːt̪ˠoːnˠ/
Various forms
Plural:
fótóin (photons)
Genitive singular:
fótóin, an fhótóin (e.g. fuinneamh an fhótóin, the energy of the photon)
Genitive plural:
fótón, na bhfótón (e.g. sruth na bhfótón, the stream of photons)

What does “fótón” mean?

photon
A photon is the smallest particle or quantum of light and other electromagnetic radiation.Also: light particle, quantum of light.

“Fótón” with the article

The plural of photon in Irish is fótóin. Here is fótón after the article (an t-alt), in the singular and the plural.

an fótón
the photon
No change after an
na fótóin
the photons
Plural: no change after na

“Fótón” in a sentence: Irish examples

Common Irish sentences using fótón, the Irish word for photon.

Is cáithnín solais é fótón.
A photon is a particle of light.
Níl mais ag an bhfótón.
The photon has no mass.
Taistealaíonn fótóin ar luas an tsolais.
Photons travel at the speed of light.
Braitheann fuinneamh an fhótóin ar a mhinicíocht.
The energy of the photon depends on its frequency.
Scaoileann an t-adamh fótón nuair a chailleann sé fuinneamh.
The atom releases a photon when it loses energy.
Bhí líon mór fótón ag bualadh an phainéil.
A large number of photons were striking the panel.
D'fhoghlaimíomar faoi na fótóin sa rang fisice inniu.
We learned about photons in physics class today.

Other nouns in Irish

More everyday Irish nouns to learn next.

Photon in Irish: frequently asked questions

What is the Irish for photon?

The Irish for photon is fótón (pronounced “FOH-tohn”). It’s a masculine noun and the plural is fótóin.

How do you pronounce fótón in Irish?

Fótón is said like “FOH-tohn” (IPA /ˈfˠoːt̪ˠoːnˠ/).

What is the plural of photon in Irish?

The plural of fótón is fótóin; with the article, na fótóin means “the photons”. The genitive plural is fótón, as in sruth na bhfótón (the stream of photons).

Why does fótón change to fhótón or bhfótón?

Irish changes the start of some words after certain words. After mo (my) fótón becomes m'fhótón (lenition), and after ár (our) or i (in) it becomes ár bhfótón (eclipsis).

Is 'fótón' related to 'fótó'?

Both come from the Greek word for light, but 'fótó' means a photograph, while 'fótón' is a particle of light in physics.

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