Recent content by mdeng

Oh, I also realized my ignorance in my question because, as another post said, "If you shoot two rocks past the Earth, one more massive than the other, with the same initial positions and velocities, they will both follow identical trajectories. By analogy, the same should be true for two...

Thanks. But what's behind the statement of "even light can't escape the gravitational pull of a black hole", is it not due to photons having mass therefore are subject to the pull?

Since high frequency photons have more relativistic mass, should we expect them to bend more than lower frequency lights when traveling through a gravitational field, thus produce a rainbow effect? But we don't seem to experience rainbow effects with star light.

Could someone explain the idea, method of how Earth orbit was derived, in non-mathematical terms (well, some math is fine too)? I am more interested in the (ingenious) engineering/experimental approach behind it. I guess it's related to or requires the determination of Earth mass, and from the...

TBH, I never understood why this is a conundrum. If time/distance are not infinitely divisible, the answer is obvious, no conundrum. Assume that time is infinitely divisible. Now, if we keep looking at only half of the remaining distance as the puzzle requires, we are just fooling ourselves by...

A Faraday cage cancels the effect of an external electric field on the objects inside the cage by creating an opposite field on the cage. Thus, yes, if there are negative mass, we can build a Farday cage to block gravity using materials which "conduct" both +/- masses. Also did some more...

Thanks. Could you point me to some readings on the part of photons (or EM, both?) "being liberated and pushed into this state"?

It's a side track, just to illustrate that the electron's speed wasn't at c. Thanks for a straight answer. Appreciated. I think you have got a point here too.You are probably right that they are not being created continuously during all that time, and we know photons are not the same as...

Yes, agree. My original question was not well worded. My question was, as you seem to have pointed out, about an explanation of the postulate of photon's property, not about how SR may explain it which as you have show would be going in circles. I hope to see a deeper understanding about photons...

I like this view from another angle, though I have yet to see what I may reap from it. How would you think about the relation between this view of nature and the locality principle? Some claims that from that principle, it entails that the propagation speed must be finite, have an upper bound...

I sort of agree. I understand that from SR's perspective, I should take them for granted. However, I am also fascinated about how the nature pulls off such tricks. Just want to see whether anyone has come up with an answer/postulate/theory about such. Any pointer as to where such questions might...

Thanks for pointing this out. Given that electron's orbit's radius is in the vicinity of 10^-11m, this gives the electron's orbit change a speed of around 10^3-10^4m. So during this 10^7-10^-8 time interval, how does a "photon embryo" transform to a "full-grown" photon in terms of its speed...

I understand this as postulated by SR. I also understand that it will be ill-fated to try to explain a postulate using the theory that is based on it. So, perhaps I should rephrase my question as: is there any competing theory that offers some alternative explanation of this phenomenon?

Photon can be emitted by an electron's changing of its orbit. As we know. photon always travels at speed c, never less. That means, a phone would acquire its speed c (relative to the electron/atom) instantaneously (i.e., in 0 elapse of time). What physical force could have made such a push? On...

I was wrong. see my reply above. I mean between the inside and the outside. Your point is that Coulomb's law does not tell how to "cancel" (or shield from) a electric field, and yet it can be done by a Faraday cage? If so, what conclusion did you want to draw? However, GR says that...