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Uncertainty principle. Canonical commutation rule for position q and momentum p variables of a particle, 1927. pq − qp = h / (2 πi ). Uncertainty principle of Heisenberg, 1927. The uncertainty principle, also known as Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics. It states that there is a limit to the ...
Eiwa (永和) was a Japanese era name (年号, nengō, lit. year name) of the Northern Court during the Era of Northern and Southern Courts after Ōan and before Kōryaku. This period spanned the years from February 1375 through March 1379.
v. t. e. Jōwa (貞和) was a Japanese era or nengō which was promulgated by the more militarily powerful of two Imperial rival courts during the Era of Northern and Southern Courts (南北朝時代, nanbokuchō jidai). This nengō came after Kōei and before Kannō and lasted from October 1345 through February 1350. [1] .
Japanese office workers watching the announcement on a live television broadcast. Reiwa ( Japanese: 令和, pronounced [ɾeːwa] ⓘ or [ɾeꜜːwa] [1] [2]) is the current and 232nd era of the official calendar of Japan. It began on 1 May 2019, the day on which Emperor Akihito 's eldest son, Naruhito, ascended the throne as the 126th Emperor ...
Eishō (Heian period) Eishō (永承) was a Japanese era name (年号,, nengō,, lit. "year name") after Kantoku and before Tengi. This period spanned the years from April 1046 through January 1053. [1] The reigning emperor was Go-Reizei -tennō (後冷泉天皇). [2]
v. t. e. Keiun (慶雲), also known as Kyōun, was a Japanese era name (年号, nengō, "year name") following Taihō and preceding Wadō. The period spanned the years from May 704 through January 708. [1] . The reigning emperors were Monmu -tennō (文武天皇) and Genmei -tennō (元明天皇). [2] Change of era.
v. t. e. Daiei (大永), also known as Taiei or Dai-ei, was a Japanese era name (年号, nengō, "year name") after Eishō and before Kyōroku. This period spanned the years from August 1521 through August 1528. [1] . The reigning emperors were Go-Kashiwabara -tennō (後柏原天皇) and Go-Nara -tennō (後奈良天皇). [2] Change of era.