Recent content by derz

The energy of the explosion comes from the electrons, which on explosion give away energy when forming more stable (less energetic) molecules. BUT a grenade doesn't explode because of the electromagnetic repulsion between the electrons. I assume that this is what you were after. (?)

Not in "arbitrarily short proper time", since the crew will always observe their velocity being less than c relative to every other inertial frame. "A million times c" is out of the question. The crew will always observe the objects velocity lower than c. According to the crew the buoy...

The equivalence principle says nothing more than that a constantly accelerated frame is equivalent to a homogenous gravitational field, i.e objects move the same way in both conditions. This is apparently true. Keep in mind that "real" gravitational fields are never homogenous.

Thanks for the replies everyone! koantum, your post was an eye opener. Thanks. It's funny that you pointed out that you get the Compton wavelenght out of the eq. Didn't figure that out. Can't wait a few years to get to the uni to actually study this stuff.

OK... never mind then, you can close this thread Oh well, you learn new stuff everyday :-p

I'm just an undergrad who's interested in theoretical physics so please be gentle :biggrin: I've always had the question in mind that does an electron possesses a "rest frequency" that you could derive from it's rest energy... and since I didn't find any info on this on the net I decided to...

This link should get you started: http://en.wikipedia.org/wiki/History_of_special_relativity

1) Theres no theoretical upper limit on the wavelenght of the EM-spectrum. On the horizon of our visible universe there's an barrier of "infinite redshift". Also, EM-radiation radiated by a body falling into a black hole will also redshift into "infinity" at the event horizon. 2) No, the 5...

Kinetic energy is a relative concept (and remember, photons possesses only kinetic energy).

Everybody interested about the strange things of QM should read Richard Feynmans QED: strange theory of light and matter. After you've read it you'll probably think that QM is even stranger than you thought.

Light doesn't have a rest frame. If it did, it wouldn't travel at c in every frame of reference. This would also mean that photons have rest mass, which they don't possess.

Well, the special theory of relativity for example. Why? Because, as you said, all motion is relative. This means that even if the electron moves very close to the speed of light relative to some other observer, the electron is at rest in it's own frame of reference. So atoms won't just "drop...

jimmysnyder already explained it, but I always seem to get people to understand curved spacetime better with this simple semantic presentation: Imagine that you take a ball at your hand and throw it at an angle of 45°. What happens if spacetime is Euclidic (ie. non curved)? The ball moves away...

If you mean time as a 4th dimension then yes, I think everyone here is aware of that.

1. Don't read pseudoscience, Einstein is right. 2-3. According to relativity, increased kinetic energy of an object is actually increased mass of an object. Here we talk about relative mass (which depends on the frame of reference), not the rest mass of an object. Anyway, since the object gains...