Measuring Time Progression Between The Living Room And The Upstaris Bedroom

Watching "How The Universe Works" last night one of the physicists said there is a clock so sensitive it can actually measure the difference in time between being on he first floor and he second story of your house! This was said while discussing distance from mass like Earth and flying in planes where time moves slower. The closer you are to the surface the faster time goes. I would say that is one pricey timepiece. It was also said if you entered the circumference line of a black hole (which cannot be measured in thickness) you could enter then come back out before you entered?!! I don't recall the name of this circular "line".

I didn't know we had gotten that sensitive yet, but it was just a matter of time.

That actually wasn't intended to be a pun.

BrewerBob said:

I didn't know we had gotten that sensitive yet, but it was just a matter of time.

That actually wasn't intended to be a pun.

Click to expand...

I bet Patek can't do that.

rhinefire said:

It was also said if you entered the circumference line of a black hole (which cannot be measured in thickness) you could enter then come back out before you entered?!! I don't recall the name of this circular "line".

Click to expand...

This is incorrect. Once you cross the event horizon (that's what it's called), you cannot come back.

Paleocon said:

This is incorrect. Once you cross the event horizon (that's what it's called), you cannot come back.

Click to expand...

No it is not the EH, that is separate from this "border". It was described as an immeasurable line surrounding the black hole. I have never heard of it before. All objects travel in a circular pattern around a black hole like the rings around Saturn before they are eventually sucked in to eh EH. Some people think things are simply sucked in to the black holes. They mentioned that because you can enter then exit in what would be before you entered it says something about the theory of not being able to travel back in time. Over my head in any case.

rhinefire said:

No it is not the EH, that is separate from this "border". It was described as an immeasurable line surrounding the black hole. I have never heard of it before. All objects travel in a circular pattern around a black hole like the rings around Saturn before they are eventually sucked in to eh EH. Some people think things are simply sucked in to the black holes. They mentioned that because you can enter then exit in what would be before you entered it says something about the theory of not being able to travel back in time. Over my head in any case.

Click to expand...

Are you referring to the accretion disk?

If so, you're incorrect, traveling into the accretion disk and back wouldn't send you back in time, it'd make you go many years into the future. And something you may be confused about is that the evnt horizon is not a discreet point you could tell when you passed.