静态引力场中红移的解释
On the Interpretation of the Redshift in a Static Gravitational Field
摘要:
在静态引力势中光的红移的经典现象,通常被称为引力红移,在文献中基本上以两种方式描述:一方面,通过时钟的行为来解释这种现象,时钟在势中的位置越高,运行越快,而传播光子的能量和频率不随高度而变化。因此,相对于时钟的频率,光看起来是红移的。另一方面,这种现象也被(甚至在一些权威的文本中)从光子克服大质量物体的引力时的能量损失的角度来讨论。这第二种方法使用诸如光子的“引力质量“或“势能”之类的概念,我们断言它是误导性的。我们并不声称提出任何原创的想法或给一个全面的审查的主题,我们的目标基本上是一个教学。
英文摘要:
The classical phenomenon of the redshift of light in a static gravitational potential, usually called the gravitational redshift, is described in the literature essentially in two ways: on the one hand the phenomenon is explained through the behaviour of clocks which run the faster the higher they are located in the potential, whereas the energy and frequency of the propagating photon do not change with height. The light thus appears to be redshifted relative to the frequency of the clock. On the other hand the phenomenon is alternatively discussed (even in some authoritative texts) in terms of an energy loss of a photon as it overcomes the gravitational attraction of the massive body. This second approach operates with notions such as the "gravitational mass" or the "potential energy" of a photon and we assert that it is misleading. We do not claim to present any original ideas or to give a comprehensive review of the subject, our goal being essentially a pedagogical one.
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