I Does Time Slow Down in a Deep Osmium Room?

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The discussion centers around the concept of time dilation in a hypothetical room made of osmium, located 10 km underground. Participants argue that the mass of the room would not significantly affect spacetime curvature, and thus time would not run noticeably slower inside compared to the surface. The Shell Theorem is referenced, indicating that a spherical shell of mass does not influence gravitational effects inside it, which would mean clocks inside the room would tick at the same rate as those outside. The conversation also touches on the impracticality of using extremely dense materials, like those from neutron stars, and the need for a room with mass greater than Earth to create significant time dilation. Overall, the consensus is that the proposed scenario would not yield the desired effects on time.
  • #31
phinds said:
So the gravitational potential at 1000Km above the Earth is less than that on the surface, thus making time run faster at the 1000Km mark.
No. The gravitational potential at 1000 km is larger. That’s why stuff gains kinetic energy as it falls.

phinds said:
And then (according to you) the gravitational potential at the center of the Earth is less than at the surface, thus making time run slower than on the surface
In exact analogy, yes.

phinds said:
despite it also being at a lower gravitational potential.
Because of, not despite.
 
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  • #32
Orodruin said:
No.
See post #28
 

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