PeterDonis's latest activity
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PeterDonis reacted to Dale's post in the thread Undergrad The Einstein Clock aka Light Clock with
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Yes, there is a problem. The problem is here: That is false. The source of light is current and charge densities, as described by... -
PeterDonis posted the thread Graduate Strong Progenitor Age Bias in Supernova Cosmology in Cosmology.The thread title is the first part of the title of a paper published just today [1]. Here is the abstract: [1]...
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PeterDonis replied to the thread Undergrad Does a person's mass affect time?.The OP was asking about an individual person's mass affecting their perception of time. That is not only "not noticeable in common...
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PeterDonis replied to the thread Undergrad Does a person's mass affect time?.This is very vague. The correct statement is that the curvature of spacetime is affected by the presence of stress-energy, via the...
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PeterDonis replied to the thread Undergrad About the notion of non-standard inertial frame.You can do this, but you can't do it by only transforming the spatial coordinates from a standard inertial frame. In fact, the simplest...