プランク定数

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Japanese

Kanji in this term
定 数
てい
Grade: 3 		すう
Grade: 2
on'yomi
Alternative spelling
プランク定數 (kyūjitai)
 プランク定数 on Japanese Wikipedia

Etymology

From プランク (Puranku, “from German Planck”) +‎ 定数 (teisū, “constant”).

Pronunciation

Noun

プランク定(てい)数(すう) • (Puranku teisū) 

  1. (physics, quantum mechanics) Planck's constant
    世(せ)界(かい)量(りょう)子(し)デーが 4(し)月(がつ) 14(じゅうよっ)日(か)に定(さだ)められたのは、プランク定(てい)数(すう)がおよそ 4(よん).(てん)1(いち)4(よん)（×(かける) 10(じゅう) のマイナス 15(じゅうご)乗(じょう)電(でん)子(し)ボルト・秒(･びょう)）で表(あらわ)されることがあるからです。
    Sekai Ryōshi Dē ga shigatsu jūyokka ni sadamerareta no wa, Puranku teisū ga oyoso yon-ten-ichi-yon (kakeru jū no mainasu jūgo-jō denshi boruto･byō) de arawasareru koto ga aru kara desu.
    April 14 was designated World Quantum Day because Planck's constant is sometimes expressed as approximately 4.14 × 10−15 electron volt-seconds.
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