Scientists are not dependent on the ideas of a single man, but on the combined wisdom of thousands of men, all thinking of the same problem - Ernest Rutherford (but I'm sure he meant women too...)
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Confused about Weinberg's result of gravitational time dilation added 300 characters in body |
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4h
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Confused about Weinberg's result of gravitational time dilation added 300 characters in body |
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4h
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Confused about Weinberg's result of gravitational time dilation added 300 characters in body |
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4h
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Confused about Weinberg's result of gravitational time dilation The freely falling clock cannot be simultaneously at two positions. The formula is comparing the clock rates at one position. |
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5h
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Confused about Weinberg's result of gravitational time dilation Well what do you mean by "a clock runs slower in a gravitational field" - it only runs slower compared to a stationary clock that is "higher up" - i.e. in a different place. Your clocks are in the same place. |
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Confused about Weinberg's result of gravitational time dilation Now I'm confused. We need a proper definition of what these time intervals are. Is $dt$ (in contradiction with almost every GR text I've seen) a proper time interval for a stationary observer at some point in the gravitational field and $\Delta t$ the proper time interval for a free-falling body at the same position? |
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5h
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answered | Confused about Weinberg's result of gravitational time dilation |
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1d
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Why are laser beams not affected by gravitational waves in Michelson interferometer? This question is similar to: Is LIGO flawed by the identical expansion of laser wavelength and arms in presence of a gravitational wave?. If you believe it’s different, please edit the question, make it clear how it’s different and/or how the answers on that question are not helpful for your problem. |
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1d
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answered | Magnetic field for a cylindrical shell in which current flows |
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1d
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What is the relationship between core temperature and surface temperature in main-sequence stars? Can you clarify what you want. An understanding of why the relationship exists or just a table of values? (There is no simple analytic relationship) |
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2d
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Isn't the induced electric field vector always tangent to the loop? Since the law is true for any loop then how could your proposal be correct? |
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2d
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What is the nature of magnetism within and without the Galatic plane? Comments are not for answers. |
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Jul
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answered | Are we certain of the mass we calculate for supermassive black holes? |
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Jul
5 |
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Why Cepheids have Period Luminosity relation? @Polaris5744 I got from your question that you understood the kappa mechanism but wanted to know why there was a period-luminosity relationship. |
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Jul
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Why are heavier nuclei unstable? That's why I wrote "highly neutron rich nuclei will be unstable". |
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Jul
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Does a football field size asteroid really fall past the moon once a week? It's the cross-sectional area that matters not the volume. I.E. probability of getting within $r$ goes as $r^2$. The lifetime risk of being killed by an asteroid is higher than an airplane crash for most people I believe. |
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Jul
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answered | Is this a galaxy? |
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Jul
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Why Cepheids have Period Luminosity relation? deleted 1 character in body |
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Jul
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answered | Why Cepheids have Period Luminosity relation? |
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Jul
3 |
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awarded | Necromancer |