| Topic: |
Science > Physics |
| User: |
"Tom Lopata" |
| Date: |
03 Jul 2004 01:18:12 AM |
| Object: |
Speed of gravity? |
Scientists who are trying to determine the speed of gravity equate it
to being the same as the speed of light according to Einstein's theory
of relativity. Does that necessarily mean that gravity has to be
measured in miles or kilometers? Gravity isn't an accelerated photon
such as light therefore can it be measured in the same manner? I know
the moon and the sun have a direct impact on the ocean tides, if it
were a total eclipse, then would the tides go down canceling out the
gravitational pull of the sun. If not, then is the only way of
measuring gravity constant to the earth's gravity?
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| User: "Jim Black" |
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| Title: Re: Speed of gravity? |
03 Jul 2004 11:12:50 AM |
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(Tom Lopata) wrote in message news:<5c47ab7d.0407022218.6058543d@posting.google.com>...
Scientists who are trying to determine the speed of gravity equate it
to being the same as the speed of light according to Einstein's theory
of relativity. Does that necessarily mean that gravity has to be
measured in miles or kilometers? Gravity isn't an accelerated photon
such as light therefore can it be measured in the same manner? I know
the moon and the sun have a direct impact on the ocean tides, if it
were a total eclipse, then would the tides go down canceling out the
gravitational pull of the sun. If not, then is the only way of
measuring gravity constant to the earth's gravity?
When it is said that the "speed of gravity" is equal to light, this
means that if the source of the gravitation changes somehow, a distant
object would notice the gravitational effects of this change after the
time it would take light to travel the distance. For example, if for
some bizarre reason our sun underwent a violent explosion, we would
feel the gravitational consequences of this about 8 minutes later.
The speed of light is also the velocity at which gravitational waves
should propagate.
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