光速

速度

About

Thing
光速,指光在真空中的速率,是一个物理常数,一般记作c,精确值为299792458m/s。这一数值之所以是精确值,是因为米的定义本身就是基于光速和国际时间标准的,任何对光速更精确的测定,都不会改变光速的精确值,相反地,将会使得人们对一米和一秒的定义更为精确。 根据狭义相对论,光速是宇宙中所有的物质运动、信息传播的速度上限,也是所有无质量粒子及对应的场波动在真空中运行的速度。这一速度独立于射源运动以及观测者所身处的惯性参考系。
光速
Definition
光速,指光在真空中的速率,是一个物理常数,一般记作c,精确值为299792458m/s。这一数值之所以是精确值,是因为米的定义本身就是基于光速和国际时间标准的,任何对光速更精确的测定,都不会改变光速的精确值,相反地,将会使得人们对一米和一秒的定义更为精确。 根据狭义相对论,光速是宇宙中所有的物质运动、信息传播的速度上限,也是所有无质量粒子及对应的场波动在真空中运行的速度。这一速度独立于射源运动以及观测者所身处的惯性参考系。
光速
光速
光速,指光在真空中的速率,是一个物理常数,一般记作c,精确值为299792458m/s。这一数值之所以是精确值,是因为米的定义本身就是基于光速和国际时间标准的,任何对光速更精确的测定,都不会改变光速的精确值,相反地,将会使得人们对一米和一秒的定义更为精确。 根据狭义相对论,光速是宇宙中所有的物质运动、信息传播的速度上限,也是所有无质量粒子及对应的场波动在真空中运行的速度。这一速度独立于射源运动以及观测者所身处的惯性参考系。

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