Nothing faster than light!

[firecracker]

:shrug: Pyrotex: Good analogy!

 

Arkain101: No need for an archemedes spiral. We're only subtending 1 degree (second of time) for the detector.

 

CraigD: Very good!

 

Helicopter blades often exceed the velocity of sound even though the hub velocity is much lower.

 

Einstein, in his relativity discussions, spoke frequently of 'ponderable bodies'. His theories were based principally on ideas of his own, thought experiments, and modifications and references to the theories of Lorentz, Poincare', and others. But his theories have run the gamut of peer criticizm for a century! My thread was simply to see if one more 'pair of gloves could fall'.

[arkain101]

Arkain101: No need for an archemedes spiral. We're only subtending 1 degree (second of time) for the detector.

 

?

 

Who said we need an archemedes spiral... I placed your experiment inside a dust chamber to help explain.

 

If it didnt help thats okay.. lol, I'll back up and read.

[LaurieAG]

Viewing from above so that we have a circle with a radius. We can clearly comprehend that light closer to the source will reach us earlier, so we will observe a spiraling shaped laser beam, if the chamber is large enough in our mind (1 light year). Although we observe a spiral shaped beam, this is just a picture formed in our mind. What is actually occuring is a series of pathways akin to this.

 

 

Hello Arkrain101,

 

Interesting image. In fact very similar to the captures obtained from an optical feedback loop. Do you think that this could possibly have anything to do with how spiral galaxies are perceived?

 

p.s. when you introduce a shadow into the 'perfect orb', that becomes trapped due to the lag contained in the electronic portions of the path, you get a very accurate and stable example of a standing Einstein Ring.

[firecracker]

Thank you for considering my last post! Most of you didn't read the entire problem to be aware that there was a sensitive detector in space to detect the "thing" rotating in excess of the speed of light.

Let's look at another situation:

We're in a spacecraft travelling at near the speed of light relative to the point of departure. Aboard this spacecraft is a complete optical bench for measuring the speed of light. There is a light in the tail of the craft illuminating the nose. As I measure the speed of light on my optical bench, I see that it is, indeed, 300,000 km/sec, and its spectrum is that of pure white light with the center of the spectrum measuring 500 Angstroms (pure green).

My question is: does this satisfy the requirement for all observers?:naughty:

[Buffy]

Not clear what your question is. Satisfy *what* requirement? The speed of light will register correctly within your reference frame as it will for others.

 

Relatively constant,

Buffy

[firecracker]

:( Thanks Buffy,

sorry: In the Special Theory or Relativity the speed of light is the same for all observers, independent of inertial frames. This has always been a stickler for me. You will notice that I said the spacecraft is travelling 'near the speed of light'. As it leaves its launch point (original inertial frame), light signals emmitted from it are red shifted, so much so that the spacecraft soon becomes 'invisible' being red shifted out of the visible spectrum. If there was a spacecraft flying in formation with the original one, light signals could be exchanged between the two ships with no degradation in spectrum quality as long as they were at the same relative velocity.

It appears to me that if there were an observer who could see the red shifted light as pure "white light", he would be able to measure the speed as 300,000 km/sec, but 'I' wouldn't be able to see him with any of my light signals. His measuring rods would be so much longer than mine and his second of time would be proportionally larger as well, that he would exist essentially in another dimension.

[Pyrotex]

:) Thank you for considering my last post! Most of you didn't read the entire problem to be aware that there was a sensitive detector in space to detect the "thing" rotating in excess of the speed of light.

Let's look at another situation:

We're in a spacecraft travelling at near the speed of light relative to the point of departure. Aboard this spacecraft is a complete optical bench for measuring the speed of light. There is a light in the tail of the craft illuminating the nose. As I measure the speed of light on my optical bench, I see that it is, indeed, 300,000 km/sec, and its spectrum is that of pure white light with the center of the spectrum measuring 500 Angstroms (pure green).

My question is: does this satisfy the requirement for all observers?:(

Several tiny glitches I should point out. No such thing as "pure white light"; white is a mixture of colors within the human eye.

 

Your optical bench will always measure ANY light to be 300,000 km/sec.

 

You cannot measure the speed of the "thing" (I assume to mean the "lighthouse beam spot" sweeping by you at faster than c speed) because it is not a "thing" at all. The photons in the beam spot are actually traveling at right angles to the projected spot's tangential speed. Those photons (if you measured them) are traveling at c.