SUBSIM Radio Room Forums - Weird physics question

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Aramike

11-16-10 10:46 PM

Quote:

Originally Posted by Raptor1 (Post 1536690)

Of course, but I think the point was that relativity doesn't actually forbid something from going over the speed of light, you just can't accelerate anything to the speed of light in the first place.

That's true for anything with information or mass. However, we can routinely violate c regarding massless particles and radiation.

Diopos

11-17-10 05:09 AM

Quote:

Originally Posted by Gargamel (Post 1536800)

From your Link:

Since we are dealing with speeds of no more than that of pushing a pencil, lengthwise, across a table, this theory has no application in this scenario.

In the link, paragraph "Paradoxes" as regard to the concept of rigid bodies.

.

TarJak

11-17-10 05:43 AM

I may be wrong, but the string in the OP exists at both points a and b at the same time. Depending on the relativity of the observer, the light will either arrive before, after or at exactly the same time as the string movement is felt. It's all relative.:D

Raptor1

11-17-10 06:28 AM

Quote:

Originally Posted by Aramike (Post 1536813)

That's true for anything with information or mass. However, we can routinely violate c regarding massless particles and radiation.

Ordinary massless particles can routinly go faster than light in a vacuum?

DarkFish

11-17-10 09:34 AM

http://files.sharenator.com/12856353...-98034-580.jpg
http://www.sharenator.com/Physics_troll/
;)

Aramike

11-17-10 06:05 PM

Quote:

Originally Posted by Raptor1 (Post 1536935)

Ordinary massless particles can routinly go faster than light in a vacuum?

I didn't say ordinary...

Was referring to phase velocities (and not in vacuum) and subatomic polarity shifting.

Gargamel

11-17-10 06:13 PM

Quote:

Originally Posted by Diopos (Post 1536905)

In the link, paragraph "Paradoxes" as regard to the concept of rigid bodies.

.

All of the paradox's refer to objects that are undergoing length contractions. Our 'stick' is not moving fast enough to undergo this phenomenon.

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