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prj45
- 17
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Can anybody explain it to me?
HallsofIvy said:What exactly is your question? The only answer to the question as you have phrased it is "because that's the way the metre is defined"! If you used some other unit for length, you would get another number. In texts on relativity it is common to assume 1 "light-second" as the unit of length so that the speed of light is 1.
If your question is really "why is the speed of light the same in all frames of reference" I doubt that anyone can give you a simple answer.
HallsofIvy said:What exactly is your question? The only answer to the question as you have phrased it is "because that's the way the metre is defined"! If you used some other unit for length, you would get another number. In texts on relativity it is common to assume 1 "light-second" as the unit of length so that the speed of light is 1.
If your question is really "why is the speed of light the same in all frames of reference" I doubt that anyone can give you a simple answer.
prj45 said:"why is the speed of light the same in all frames of reference"
nope, not that.
OK, why does the speed of light appear to be the speed it is when measured?
What initial condition caused it to be the speed we observe it at, and not 10m/s for instance?
dextercioby said:Because some ignorant sadistic idiots from the Bureau of Sèvres wanted the the change the definition of the meter for the third time in 200 years (1983),but just 22 years after the previous.
Ivan Seeking said:Units of measure aside, the speed of light is determined by the permeability and permittivity constants, which are in turn measures of the electric and magnetic properties of space.
We can scarcely avoid the inference that light consists in the transverse undulations of the same medium which is the cause of electric and magnetic phenomena
The speed of light, also known as the constant c, is a fundamental constant in the universe. It is the maximum speed at which all energy, matter, and information can travel. This speed was determined by numerous experiments and observations, and it has been found to be a universal constant in all frames of reference.
The number 299,792,458 is the value of the speed of light in a vacuum. It is measured in meters per second and is considered a universal constant. This means that the speed of light is the same regardless of where it is measured or the frame of reference.
The speed of light was first determined by Danish astronomer Ole Rømer in the 17th century by observing the moons of Jupiter. Since then, it has been calculated and measured through various experiments and observations using different methods such as the Fizeau-Foucault apparatus and the Michelson-Morley experiment.
The speed of light is considered a universal constant because it is the same in all frames of reference. This means that no matter how fast an observer is moving, they will always measure the speed of light as 299,792,458 meters per second. This is a fundamental principle in physics and has been confirmed by numerous experiments and observations.
According to the current understanding of physics, the speed of light is the maximum speed at which anything can travel. No object with mass can reach or exceed the speed of light. However, recent studies have suggested that particles called neutrinos may be able to exceed the speed of light, but further research is needed to confirm this possibility.