B No object actually approaches the speed of light

[Atlan0001]

If one observes some object nearing the speed of light, the spatial observation is far behind the times. The object is now (time) elsewhere in space . . . all the way to distantly far elsewhere from the observed placement in space.

 

[Ibix]

If one observes some object nearing the speed of light, the spatial observation is far behind the times.

It is true that the finite speed of light has effects on direct observations - Terrell rotation is one. But that does not stop objects moving close to the speed of light with respect to another object. You are doing it now, for instance, with respect to particles in an accelerator.

 

[PeroK]

If one observes some object nearing the speed of light, the spatial observation is far behind the times. The object is now (time) elsewhere in space . . . all the way to distantly far elsewhere from the observed placement in space.

It depends how quickly the object is accelerated and also on the shape and direction of the path. An object could be accelerated towards you and you might measure its speed as it passes a short distance away. Or, an object could be accelerated in a circular path and you could measure how quickly it completes each circle.

In any case, particles in an accelerator are routinely accelerated to near light speeds:

https://en.wikipedia.org/wiki/Particle_accelerator

 

[OmCheeto]

It depends how quickly the object is accelerated and also on the shape and direction of the path. An object could be accelerated towards you and you might measure its speed as it passes a short distance away. Or, an object could be accelerated in a circular path and you could measure how quickly it completes each circle.

In any case, particles in an accelerator are routinely accelerated to near light speeds:

https://en.wikipedia.org/wiki/Particle_accelerator

tl:dr

Anyone know a quick back of the napkin number of the power involved with a moon diameter particle accelerator which accelerates a nano-camera to 10% of light speed? I'm interested in seeing actual results.

guesstimation of mass of nano-camera: 6e-8 kg (they said it was about the size of a grain of salt)

 

[DaveC426913]

If one observes some object nearing the speed of light, the spatial observation is far behind the times. The object is now (time) elsewhere in space . . . all the way to distantly far elsewhere from the observed placement in space.

A high energy muon just fell from the sky at 99.9% of the speed of light and face-planted in the ground three feet to my left. My experience of it is a mere 10 nanoseconds old.

 

[Ibix]

I'm interested in seeing actual results.

You would see rather odd things. If you try to photograph macroscopic objects moving at respectable fractions of the speed of light the variable travel time of light to your camera from different parts of the object becomes significant. Roughly speaking, you see the object rotated, not length contracted.

 

[Nugatory]

Anyone know a quick back of the napkin number of the power involved with a moon diameter particle accelerator which accelerates a nano-camera to 10% of light speed? I'm interested in seeing actual results.

guesstimation of mass of nano-camera: 6e-8 kg (they said it was about the size of a grain of salt)

Power depends on how long it takes to accelerate the camera to .9c. But energy required we can calculate: The $\gamma$ factor at .9c is equal to two and change, the energy needed is $(\gamma-1)mc^2$, so maybe one back-of-the-envelope gigajoule.

 

[Ibix]

A few misconceptions going on and you could use a solid beginners reference.
@Ibix

I usually recommend Taylor and Wheeler's Spacetime Physics, although others prefer Morin's Special Relativity for the Enthusiastic Beginner. The former can be found free on Taylor's website, the latter costs a few quid although the first chapter is free for download.

I suspect that the OP is not a native English speaker, though, so may be better off with a text in their native language.

 

[DaveC426913]

I usually recommend Taylor and Wheeler's Spacetime Physics, although others prefer Morin's Special Relativity for the Enthusiastic Beginner. The former can be found free on Taylor's website,

https://www.eftaylor.com/spacetimephysics/

 

[Herman Trivilino]

If one observes some object nearing the speed of light, the spatial observation is far behind the times. The object is now (time) elsewhere in space . . . all the way to distantly far elsewhere from the observed placement in space.

No. The object could be passing through your current location as it "approaches the speed of light". There is no requirement that it be at some distant location at that time. In fact, if you think so then post an observer at that distant location and have him record what he observes as the object passes.

Note: Edited for clarity on 17 March.