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edit approved Jun 21, 2011 at 14:56
user1778
edit approved Jun 21, 2011 at 14:56
user1778

Some threads here touching speed of gravity made me think about that. This lead to some questionquestions.

  • The speed of gravity was not measured tilluntil today (at least there are no undebated papers to that effect).

  • It seems common knowledge/believebelief among physicitsphysicists that the speed of gravity is the same as the speed of light.

And this is my question: Is thethat speed of light = speed of gravity a result of GR oror is that fed into the theory? Or is there some evidence from other sourcesources than GR for this? Does the same speed imply some deeplyingdeep-lying relation between gravity and electromagnetism?

Some threads here touching speed of gravity made me think about that. This lead to some question.

  • The speed of gravity was not measured till today (at least there are no undebated papers to that)

  • It seems common knowledge/believe among physicits that the speed of gravity is the same as the speed of light.

And this is my question: Is the speed of light = speed of gravity a result of GR or is that fed into the theory? Or is there some evidence from other source than GR for this? Does the same speed imply some deeplying relation between gravity and electromagnetism?

Some threads here touching speed of gravity made me think about that. This lead to some questions.

  • The speed of gravity was not measured until today (at least there are no undebated papers to that effect).

  • It seems common knowledge/belief among physicists that the speed of gravity is the same as the speed of light.

And this is my question: Is that speed of light = speed of gravity a result of GR or is that fed into the theory? Or is there some evidence from other sources than GR for this? Does the same speed imply some deep-lying relation between gravity and electromagnetism?

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Georg
Georg
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"Speed" of Gravity and Speed of Light

Some threads here touching speed of gravity made me think about that. This lead to some question.

  • The speed of gravity was not measured till today (at least there are no undebated papers to that)

  • It seems common knowledge/believe among physicits that the speed of gravity is the same as the speed of light.

And this is my question: Is the speed of light = speed of gravity a result of GR or is that fed into the theory? Or is there some evidence from other source than GR for this? Does the same speed imply some deeplying relation between gravity and electromagnetism?