PeroK's latest activity
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PeroK posted the thread Undergrad Electric Field of Uniformly Charged Infinite Plane in Electromagnetism.Here is a valid derivation of the electric field for an infinite plane, based on the result for an infinite wire of uniform linear... -
PeroK replied to the thread Will anyone alive today see a permanent colony on the Moon or Mars?.To many of us Elon Musk (and his kind) are the catastrophe that will destroy life for the vast majority of humans. There would be no...
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PeroK reacted to Baluncore's post in the thread Will anyone alive today see a permanent colony on the Moon or Mars? with
Haha.
That can be achieved with LSD, or the hallucinations of AI, without any need to contaminate Mars with the human epidemic from Earth. -
PeroK reacted to Ken Fabian's post in the thread Will anyone alive today see a permanent colony on the Moon or Mars? with
Like.
My pessimism is mostly grounded in resources and economics, at both ends - Earth and 'colony' - but don't dismiss other concerns like... -
PeroK replied to the thread Graduate Horizontal component of the electric field of an infinite uniformly charged plane.You should be able to use any shape (except mathematically pathological ones) and the integral convergence should work. The infinite...
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PeroK reacted to spacecadet2563's post in the thread High School Time travel without paradox with
Sad.
Time travel is logically possible. IF you moved faster than light or even a little less with time-dilation taking effect you live on... -
PeroK replied to the thread Graduate Horizontal component of the electric field of an infinite uniformly charged plane.If you have have linear wires, then the linear charge density must tend to zero, as the number of wires increases. You end up with...
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PeroK replied to the thread Graduate Horizontal component of the electric field of an infinite uniformly charged plane.An infinite uniformly charged plate is a physically impossible construction in classical electromagnetism. A charged particle has...
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PeroK replied to the thread Undergrad Photons & Time: t=0 What?.Time is what a clock measures. In this context, at least.
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Thanks for all responses...
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PeroK replied to the thread Graduate Horizontal component of the electric field of an infinite uniformly charged plane.If I have time, I'll look at the details of what you've done. In general, if you have two limits, then the order can make a difference...
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PeroK replied to the thread Undergrad Photons & Time: t=0 What?.For example, the Newtonian gravitational force is given by ##F = \frac{Gm_1m_2}{r^2}##. In theory, two point particles can be...
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PeroK replied to the thread Undergrad Photons & Time: t=0 What?.The limit is not part of the theory of special relativity.
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Yes, according to the math, the clock rate approaches zero, when its speed approaches c. So if you take the limit, it is 0 at c. What...
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PeroK reacted to renormalize's post in the thread Graduate Can a causal or time-like structure emerge without assuming a metric? with Like.
Can you illustrate your distinction between a law and a relation using examples from physics?
