Recent content by enridp

Hello ! I have a very old doubt about Electromagnetic Waves, I hope somebody can help me. Is the electric field of an EM wave really an Electric Field? I mean, what is the difference between that E field and an Electric field produced by, for example, an electron? If we have an EM wave...

Thanks jaseh86 ! I know it's a difficult question :-( I have some knowledge about genetics and biochemistry (I'm studing Bioengineering). But I can't figure out how a simple cell knows when to stop and when to start again... I mean, we start with just one cell, and then we finish with a system...

I want to know how our genes limits and define our growth, I mean, how the osteoblastos knows that they must stop or continue, how our cells knows when to stop growing or dividing, etc. Every human has a unique "morphology", the bones and skull has their own and particulary morphology, but...

It's a great analogy StatusX, I appreciate you just don't give up :) I will think it in 4D to see if it works in my brain. robphy: I have seen your video, but I see it like the vision of the Earth frame, not the cause of the real difference in the clocks, I mean, if the twin doesn't back, the...

Thanks again StatusX, and don't worry, I understand you, I'm really familiarized with relativity effects like simultaneity and time dilation and I know there's no possible to compare the clocks in two inertial frames. I know we can explain the final effect like a long and shorter way according...

Hi StatusX ! Yes, I know that, and that is what I'm asking at really. The moving twin says the cause is the gravitational field, without this gravitational field his brother will be younger. And the Earth twin says the acceleration has nothing to do here. His brother is younger because he was...

Yes, sorry, I made a mistake, it's just a simple relative observation... My question is: what is seeing the "moving" observer? and how ca he explain its observation from his own frame? (could you change the subject to a better one?) Thank you very much pervect for your links, I will read it...

Hello everybody ! This is my question: Suppose you have a mass m0 inside an ellipse (at rest). Suposse someone see it from another frame, from this frame he will see the ellipse contracted. I know there's no black hole, but, how can explain our observer this result? I'm trying to see only...

Hi pervect !: You said: Maybe that's the problem, I can't visualize what your are saying... If we can't put the "viewpoint" in our traveller twin, then how can we understand what he is seeing? Are accelerated frames invalid? I mean... if we are analyzing events from an accelerated frame, our...

Yes, you are right StatusX, and I understand it. I know there's no paradox. What I don't know is how to interpret this result. From the Earth's viewpoint acceleration is not important, only the inertial paths are (we can neglect acceleration in our calculus). From the traveller's viewpoint...

Hi StatusX ! I like your answer: "the electric field is the magnetic field" But I don't know if we can use it like: "acceleration is the gravitational field": From the Earth's viewpoint the acceleration (or gravitational field) is not the cause, actually, we can neglect its effects if the...

thanks StatusX ! At really I think yes, I mean... we can say: my hand was burnt because the heat of the stove which produced the motion of its atoms. They are not "conflicting causes". But I can't visualize the cause of the real difference between A and B's clocks. How do you interpret...

Hello ! I'm having troubles with the causes of time dilation. I will to appeal to the twin paradox because it is known for everybody. A = Earth twin. B = traveller twin. We know B is younger than A when he returns. Now, why? I mean... from the viewpoint of A, he is younger because his...

OK, therefore, A (stationary) will see the charge is radiating, and B (co-moving with the accelerated charge) will see the carge isn't radiating. Then: A will see photons B will not see photons. Now, let me add something to the experiment, imagine a wall that can be perforated by a photon. A...

This post has no answer to the problem ! I'll try to put it in a easier way: Two system: A and B with a relaive velocity v In system A there's a charge. In system B there's a compass What happens whith the compass in B's system? From the A's viewpoint there's no magnetic field around...