Speed of light and QM question...

[RyanJ]

Constants: globally or local to a reference frame?

 

Hi everyone!

 

I put this here because it is just as much SR oriented as QM but if a mod feels it should be somewhere else please move it

 

I recently came upon this idea when thinking about light speed and have a few things I need cleared up...

 

If we had a piece of string just bigger then the plank length and we accelerate it. We have one observer moving with this item at high speeds (99.9% of light say) and one not moving with the object.

 

Due to the fact that things contract from the "stationary" observers reference point he should not be able to measure the length as it will have gone below the plank length but the moving observer will be able to measure it.

 

Here is the question: is the constant only a constant for your reference frame becaue it can't seem to be a global one because what is a plank length to the moving observer is not to the stationary one?

 

Insights anyone (If I made a mistake in my reasoning point that out for me, happens a lot )

 

Cheers,

 

Ryan Jones

[swansont]

Think about how well would you would be able to measure the length and the speed of the object. (i.e. what does Heisenberg have to say on the matter?)

[RyanJ]

Think about how well would you would be able to measure the length and the speed of the object. (i.e. what does Heisenberg have to say on the matter?)

 

Ah yes uncertaintly.

 

The observer moving along would be able to measure it as they are moving relative too one and other but the stationary one would not be able to thanks to quantum uncertaintly - gocha

 

Cheers,

 

Ryan Jones

[Ragib]

The Frame of reference doesnt affect the Plank Length, because its c/plank time. Time always goes at the same rate in your own frame of refernce, and c is also constant.