Dale's latest activity
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Dale replied to the thread Undergrad What empirical observation supports the axiom of continuous spacetime?.It seems you missed the statement: This includes the Nobel-related evidence that you cited. Everything is still open to future evidence... -
Dale reacted to PeroK's post in the thread Undergrad What empirical observation supports the axiom of continuous spacetime? with
Like.
That's what philosophers say! -
Dale replied to the thread Undergrad What empirical observation supports the axiom of continuous spacetime?.Ontology is philosophy, regardless of whether the philosophy is a philosophy about physical systems or not. Physics is a science...
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Dale reacted to PeterDonis's post in the thread High School Do Dark Energy and the Casimir effect indicate Exotic Matter could exist? with Like.
That potential, if you try to think of it as valid for all ##r## out to infinity, is an idealization and never actually happens, just as...
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Bluetooth operates at about 2.4 GHz, with a wavelength of 125mm, or 5". You can expect multipath reflections which can give some peaks...
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Dale replied to the thread Graduate Geometry of Bluetooth Field.oops, I should have done the math!
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Dale replied to the thread High School Do Dark Energy and the Casimir effect indicate Exotic Matter could exist?.I think that you can say that a bound state must have lower energy than an unbound state, regardless of where you set the zero.
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Dale replied to the thread Graduate Geometry of Bluetooth Field.The Bluetooth signal is a radio wave. So it won’t have any features on the scale of three inches. More likely you were hitting a...
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Dale replied to the thread High School Propagation of Thunder.Nice answer @Ken Fabian I was just thinking in terms of dispersion, but that makes way more sense.
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A lightning bolt can be many kilometres long as well as reach high altitudes. There is sound transmitted through the ground as well as...
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Dale reacted to PeterDonis's post in the thread Undergrad What empirical observation supports the axiom of continuous spacetime? with Like.
Discreteness of what, though? Let's take the cases you give: Even leaving aside that there are arguments in the literature against the...
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Dale reacted to weirdoguy's post in the thread Undergrad What empirical observation supports the axiom of continuous spacetime? with Like.
Well, the loudest people who question GR are crackpots who have no idea about GR whatosever. And they question GR as a whole, in the...
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Dale reacted to PeroK's post in the thread Undergrad What empirical observation supports the axiom of continuous spacetime? with Like.
Ontology is philosophy, not physics. No it's not. Everyone knows GR can't be the whole story. There's an explicit singularity in the...
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Dale reacted to PeroK's post in the thread Undergrad What empirical observation supports the axiom of continuous spacetime? with Like.
It isn't. No one has found a way to make a discrete theory work. The continuum is simpler mathematically and thereby the default...