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A thread has already been made regarding the speed of Shinra Tensei being light speed. There were some issues that we need to check.
1) It was said that the speed would be slower in other medium including air.
To clarify, gravitational waves, according to the current understanding in general relativity, do not exhibit the same behavior as electromagnetic waves (including photons) when it comes to propagation through different media. Gravitational waves are not thought to interact significantly with matter in the same way that photons do.
In classical electromagnetism, the speed of light in a medium (such as air, water, or glass) can be less than its speed in a vacuum because of interactions with the atoms or molecules in that medium. This is due to the process of absorption and re-emission of photons by the atoms.
However, gravitational waves, being ripples in spacetime, are not expected to be affected in the same way by the presence of matter. In the framework of general relativity, the speed of gravitational waves is considered to be the same in a vacuum and in the presence of matter. Therefore, the speed of gravitational waves is not expected to decrease in a medium in the same manner as the speed of photons does.
Ok, still let's assume that gravitational waves exhibit the same behavior as electromagnetic waves (including photons) when it comes to propagation through different media:
Refractive index of the air at standart temperature is 1.000273 which means that we just need to divide by 1.000273 to find speed. Speed is 0.9997270745086 c.
2) I didn't get it but it was also said that speed would decrease after few microseconds. Even considering 1 microsecond, it will remain constant light speed for nearly 300 meters. Still I don't thinks it's true.
In short I want to know if I can use light speed value for calculation.
1) It was said that the speed would be slower in other medium including air.
To clarify, gravitational waves, according to the current understanding in general relativity, do not exhibit the same behavior as electromagnetic waves (including photons) when it comes to propagation through different media. Gravitational waves are not thought to interact significantly with matter in the same way that photons do.
In classical electromagnetism, the speed of light in a medium (such as air, water, or glass) can be less than its speed in a vacuum because of interactions with the atoms or molecules in that medium. This is due to the process of absorption and re-emission of photons by the atoms.
However, gravitational waves, being ripples in spacetime, are not expected to be affected in the same way by the presence of matter. In the framework of general relativity, the speed of gravitational waves is considered to be the same in a vacuum and in the presence of matter. Therefore, the speed of gravitational waves is not expected to decrease in a medium in the same manner as the speed of photons does.
Ok, still let's assume that gravitational waves exhibit the same behavior as electromagnetic waves (including photons) when it comes to propagation through different media:
Refractive index of the air at standart temperature is 1.000273 which means that we just need to divide by 1.000273 to find speed. Speed is 0.9997270745086 c.
2) I didn't get it but it was also said that speed would decrease after few microseconds. Even considering 1 microsecond, it will remain constant light speed for nearly 300 meters. Still I don't thinks it's true.
In short I want to know if I can use light speed value for calculation.