Terrestrial phenomena significantly influenced by GR?

  • Thread starter Thread starter Loren Booda
  • Start date Start date
  • Tags Tags
    Gr Phenomena
Loren Booda
Messages
3,108
Reaction score
4
What natural terrestrial phenomena are significantly influenced by general relativity?
 
Physics news on Phys.org
When I lift my legs up I fall down?

The sky is dark at night?

Garth
 
Just about everything.
 
How about affect on electromagnetic phenomena?
 
Loren Booda said:
What natural terrestrial phenomena are significantly influenced by general relativity?

Atomic clocks are sensitive enough that they "tick" noticably different depending on their elevation. There is a coordiinate time known as TAI time that is defined by averages the contributions of many different atomic clocks - it is necessary to correct for the altitude of each contributor.

Also, the issue of defining a coordinate time over the Earth's surface involves considerations of General Relativity since the Earth rotates. If you transport a clock around the rotating Earth, it won't read the same as a clock that stayed behind, no matter how slowly. This was actually done in a famous experiment.
 
Loren Booda said:
How about affect on electromagnetic phenomena?

Well,sure. All the hydogen atoms in my brain have a multiplet 'fine structure' (spin-orbit interaction) at every level except l = 0 which is due to relativistic effects. In fact, all of the heavy atoms have an even greater energetic split which is even more noticeable, and at an energy level which can only be determined precisely with full (mental) relativistic treatment.
Maybe that's why they say I have a split personality. Well, at least they can't say I'm degenerate. :smile:

However, these are only SR effects.
For GR effects you'll have to capture & measure the electromagnetic emissions (from my nuclear cranial radioactive decay) at several different terrestrial gravitational potentials and notice the resultant gravitational doppler shifts.
(Please don't reveal your findings. )

Creator :biggrin:
 
Last edited:
In this video I can see a person walking around lines of curvature on a sphere with an arrow strapped to his waist. His task is to keep the arrow pointed in the same direction How does he do this ? Does he use a reference point like the stars? (that only move very slowly) If that is how he keeps the arrow pointing in the same direction, is that equivalent to saying that he orients the arrow wrt the 3d space that the sphere is embedded in? So ,although one refers to intrinsic curvature...
ASSUMPTIONS 1. Two identical clocks A and B in the same inertial frame are stationary relative to each other a fixed distance L apart. Time passes at the same rate for both. 2. Both clocks are able to send/receive light signals and to write/read the send/receive times into signals. 3. The speed of light is anisotropic. METHOD 1. At time t[A1] and time t[B1], clock A sends a light signal to clock B. The clock B time is unknown to A. 2. Clock B receives the signal from A at time t[B2] and...
So, to calculate a proper time of a worldline in SR using an inertial frame is quite easy. But I struggled a bit using a "rotating frame metric" and now I'm not sure whether I'll do it right. Couls someone point me in the right direction? "What have you tried?" Well, trying to help truly absolute layppl with some variation of a "Circular Twin Paradox" not using an inertial frame of reference for whatevere reason. I thought it would be a bit of a challenge so I made a derivation or...
Back
Top