群ぐん速そく度ど

noun

group velocity

Technical term in physics and fiber optics; the speed at which the envelope of a wave packet travels.

• 光ひかりファイバーでは、群ぐん速そく度どが信しん号ごうの伝でん搬ぱん速そく度どを決きめる。

  In optical fibers, the group velocity determines the signal propagation speed.