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Hi guys!They said that speed of light cannot be exceeded by any means... They said that speed is a measurement of relative rate of motion between two object, yes?
Consider this;Two sources of photon (flashlights A and B) are directed toward each other and turned on...Our theory said that both photons coming out of the flashlights are speeding at the speed of light relative to their sources, yes?Question: What is the relative speed of a photon coming out of flash light A to a photon coming out of flashlight B?Isn't it TWICE the speed of light?
They said that speed is a measurement of relative rate of motion between two object, yes?
Quote from: wanhafiziThey said that speed is a measurement of relative rate of motion between two object, yes?Only when one of the objects is at rest.
I'm still tying to digest what you guys been saying.Is it possible to explain in a layman terms?tq
I'm still tying to digest what you guys been saying. Is it possible to explain in a layman terms?
Check out the two definitions below: Under the International System of Units, the second is currently defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom.... The metre is the length of the path travelled by light in vacuum during a time interval of 1/299792458 of a second... Now think about "a period of radiation". That's electromagnetic radiation. Electromagnetic radiation is light, thus the thing we call a second is being defined in terms of the motion of light.
So is the thing we call a metre.
So if you were moving very fast with respect to me, the thing you called a second would be different to the thing I called a second, and the thing you called a metre would be different to the thing I called a metre. This affects everything electromagnetic and more besides, including every atom of your body and your rulers and clocks. Things are very different between us, but you're still defining your seconds and metres using the motion of light the way it looks to you, so you'd still be measuring the speed of light to be 299,792,458 m/s.
One can construct a wholly Newtonian universe, with Galilean relativity, with these same definitions. Such a model would fail to match the available evidence, but it would still be logically consistent.