SCIENCE|natural and applied sciences|physical sciences
- solaschandam Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
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- candam solais Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
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- Photon | Lichtquant
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- light quantum | quanta
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- Definition elementary particle (photon, IATE:1555082 ) of visible light Reference Wikipedia > Photon. http://en.wikipedia.org/wiki/Photon#Nomenclature [17.3.2011]
- Comment In 1900, Max Planck was working on black-body radiation and suggested that the energy in electromagnetic waves could only be released in "packets" of energy. In his 1901 article in Annalen der Physik he called these packets "energy elements". The word quanta (singular quantum) was used even before 1900 to mean particles or amounts of different quantities, including electricity . Later, in 1905 Albert Einstein went further by suggesting that electromagnetic waves could only exist in these discrete wave-packets. He called such a wave-packet the light quantum.