The number of times the same state is repeated per second in a periodic phenomenon. In the case of waves or electrical vibrations, this is often called frequency. When the period is T , the frequency ν is ν=1/ T . The SI unit is hertz, but it is also called cycles or cycles per second. The angular frequency ω=2πν is sometimes simply called frequency. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
周期現象に関して同じ状態が毎秒あたり繰返される回数。波や電気振動などの場合には周波数ということが多い。周期 T のとき,振動数 ν は ν=1/T となる。SI単位はヘルツであるが,サイクルまたはサイクル毎秒ともいう。また角振動数 ω=2πν を単に振動数と呼ぶこともある。
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