Recent content by physicsguy13

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    Physics The Fields of Particle Physics and Astrophysics/Cosmology

    Really, I would like to know both, but career outlook is more important to me.
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    How can scientists measure the speed of light?

    Thank you Tiny-Tim! I believe I understand it now!
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    Physics The Fields of Particle Physics and Astrophysics/Cosmology

    I still have a long time to decide, but I am interested in the fields of particle physics, astrophysics, and cosmology. Here are my questions about them: 1. What field has the best outlook for the future? 2. Is there a degree that provides flexiblitiy in the choice? 3.What fields have the most...
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    How can scientists measure the speed of light?

    Also, I changed my mind. I will only post questions.
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    How can scientists measure the speed of light?

    If light is not affected by time dilation, are there any "light clocks" to measure time exactly without the effects of time dilation? Or am I still getting the concept wrong?
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    How can scientists measure the speed of light?

    I require more clarification. If I am not actually moving at 99% of c, is it because the frame of reference is moving at 99% of c? If so, would the frame of reference would see me as moving slower than c?
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    How can scientists measure the speed of light?

    I think I will come back to physics forum when I am older. For now I will only look at posts, not post myself or reply. Thank you for clearing up my question, though.
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    How can scientists measure the speed of light?

    Is it because time dillation only affects objects with mass, and photons do not?
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    How can scientists measure the speed of light?

    Please explain this to me Drakkith. I'm only 12 years old.
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    Why are the centers of galaxies so bright?

    What did I say wrong then?
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    How can scientists measure the speed of light?

    I know the textbooks say light travels 186,282.4 mps, but if time slows for a very fast object, how do scientists really know the speed of a photon?
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    Why are the centers of galaxies so bright?

    I'm sorry, I mispoke. Unless the star is very close to the black hole, it is likely that some of the light will come in our direction.
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    Julian Barbour on does time exist

    If time did not exsist, what would prevent everything from happening at once?
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