Owe Kristiansen's latest activity
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Owe Kristiansen reacted to Ibix's post in the thread I Reframing Light Bending Using Density Instead of Radius with
Like.
You seem to be missing that he's only discussing grazing orbits, so his impact parameter varies with density if the total mass is held... -
Owe Kristiansen reacted to Ibix's post in the thread I A "continous" gravitational field formula r=0 to infinity with Like.
More precisely, if you use that formula with ##M## as a constant then you are saying that all the mass is contained within the sphere of...
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Owe Kristiansen reacted to Dale's post in the thread I Intuitive look at bending of light by gravity with Like.
Sure, but that specific formula isn’t correct. The KE of light is not ##\frac{1}{2}mc^2##. For a pulse of light that expression...
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Owe Kristiansen replied to the thread Hi.Ok, thanks. @phinds, @TensorCalculus ans @PeroK. I appreciate to be guided. And also your feedback that I need to listen better.
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Owe Kristiansen reacted to TensorCalculus's post in the thread I A "continous" gravitational field formula r=0 to infinity with Like.
For the TeX lovers like me: ##g(r) = \frac {4 G\pi d r^3}{3 r^2}## for ##r < R## ##g(r) = \frac{4 G \pi d R^3}{3r^2}## for ##r >= R##...
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Owe Kristiansen reacted to Ibix's post in the thread I A "continous" gravitational field formula r=0 to infinity with Like.
It's worth noting that the Earth is nowhere near uniform density. The core is much higher density than the rest, so in practice the...
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Owe Kristiansen replied to the thread I A "continous" gravitational field formula r=0 to infinity.Thanks for visualizing my formula and letting me know about desmos.
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Owe Kristiansen reacted to robphy's post in the thread I A "continous" gravitational field formula r=0 to infinity with Like.
As I suggested above, here is an implementation in Desmos: www.desmos.com/calculator/yvk5ej85vu
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Owe Kristiansen replied to the thread I Reframing Light Bending Using Density Instead of Radius.Ok, ok. You’re right that Newtonian gravity and the weak-field approximation in general relativity aren’t the same—and I appreciate the...
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Owe Kristiansen replied to the thread I Intuitive look at bending of light by gravity.Thanks a lot for a constructive feedback. The formula with E=pc^2 + mc^2 made my day. Its intuitive and replaces my understanding that...
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Owe Kristiansen replied to the thread I Intuitive look at bending of light by gravity.Cool formula, I think in terms of energy preservation. Whether it is frequency, mass, potential or kinetic energy. Vibrations...
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Owe Kristiansen reacted to Nugatory's post in the thread I Intuitive look at bending of light by gravity with Like.
The formula that you want is ##E^2=(pc)^2+(mc^2)^2## which works for all particles whether ##m=0## or not. A photon has both particle...
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Owe Kristiansen replied to the thread I A "continous" gravitational field formula r=0 to infinity.Yes, thanks for mentioning that, GM/r is way off at r close to 0.
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Owe Kristiansen reacted to Dale's post in the thread I A "continous" gravitational field formula r=0 to infinity with Like.
I usually combine them in a single function like this for programming convenience. Often when I want to avoid the infinite energy that...
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Owe Kristiansen reacted to robphy's post in the thread I A "continous" gravitational field formula r=0 to infinity with Like.
These “logical expressions” comprise a sometimes useful computational trick to avoid case-statements, as you say. This can be...