Recent content by freshnfree

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    B Speed of Light Invariant in Vacuum: Experiment Proof

    The scenario I am referring to is one which would show that the speed of light is invariant. So we would have a vacuum and a moving observer and a light wave. Could you please tell me of a known experiment of that type of scenario.
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    B Speed of Light Invariant in Vacuum: Experiment Proof

    we cannot create very large vacuums and light travels incredibly fast. i cannot see any specific experiment that refers to this type of scenario.
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    B Speed of Light Invariant in Vacuum: Experiment Proof

    Just wondering, also, how we do we know what light is doing in a vacuum because we don't see light until it reaches our atmosphere?
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    B Speed of Light Invariant in Vacuum: Experiment Proof

    Hi, I have gone to the top of this forum but I am not sure of which sticky thread you are referring to.
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    B Speed of Light Invariant in Vacuum: Experiment Proof

    I am getting confused as to which experiment proved that the speed of light was invariant in a vacuum. At first I thought it was the Michelson-Morley experiment but that does not have a moving observer.
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    I A light wave and a sound wave travelling together

    If we could imagine a medium that could slow down light quite significantly, if a sound wave and a light wave were both passing through this medium, would the sound wave see the light wave passing by at the speed that light passes through that medium or would it see it passing by at the speed...
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    I Speed of light and speed of sound both constant

    I would have a thought a forum was a very good place to make a challenge. Making mistakes is part of learning. It is not a problem to make a mistake, the problem is when the mistake is never corrected because it has been around forever and is therefore thought not to be a mistake. It was 6 years...
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    I Speed of light and speed of sound both constant

    I may sound like a novice because I have made some errors, but strangely I knew when I said that the speed of sound was always constant that it was wrong. I still said it because in my mind I was trying to figure something out and that is sometimes how it works. I am not an expert either but I...
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    I Speed of light and speed of sound both constant

    What exactly do you mean by GPS is doing the second one? Do you mean that GPS is the equivalent of an experiment where you have an observer moving relative to the medium in which there is the source of a beam of light? If that is the case, could you please be more specific in the details.
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    I Speed of light and speed of sound both constant

    This discussion has evolved but it is still in essence comparing light and sound waves. I realized my mistake when I said that the speed of sound would be the same in any situation. It wouldn't if the observer was moving relative to the medium of the sound wave. So have there been any other...
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    I Speed of light and speed of sound both constant

    Yes I know that the velocity of the source does not come into play, it is the velocity of the observer which is important relative to the medium. The experiment done by M-M is not using a simple method whereby you have a source of light, such as a torch and then you have an observer moving...
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    I Speed of light and speed of sound both constant

    I looked at that. I do not see it mention something or someone which is moving relative to the source of the light.
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    I Speed of light and speed of sound both constant

    From what I have read in the Michelson-Morley experiment they shone two beams, one in the direction of the spin of the Earth and one in the opposite direction. There was no moving observer. What have you read about the Michelson-Morley experiment?
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    I Speed of light and speed of sound both constant

    which observer was moving in the michelson-morley experiment?
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