What Would the Rocks Be Rotating With Respect To in Newton's Thought Experiment?

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SUMMARY

In Newton's thought experiment regarding rotating rocks in deep space, the rocks rotate with respect to an inertial frame of reference. If the universe is devoid of other massive objects, light can serve as a frame of reference. A laser aimed from one rock to another will miss its target if the rocks are rotating, demonstrating this principle through a simple Sagnac device, which detects rotation based on light's behavior in a rotating system.

PREREQUISITES
  • Understanding of inertial frames of reference
  • Basic knowledge of Newtonian physics
  • Familiarity with the concept of light as a reference frame
  • Awareness of Sagnac effect principles
NEXT STEPS
  • Explore the implications of inertial frames in classical mechanics
  • Study the Sagnac effect and its applications in modern technology
  • Investigate the relationship between rotation and light propagation
  • Learn about advanced concepts in relativity and their connection to Newton's laws
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Physics students, educators, and anyone interested in classical mechanics and the principles of rotation in inertial frames.

chuckset
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I'm not sure where this thread should go, sorry if it's in the wrong place.

In Newton's thought experiment about the rotating rocks going taut in deep space. With respect to what would the rocks be rotating?
 
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An inertial frame of reference, of course.
 
chuckset said:
I'm not sure where this thread should go, sorry if it's in the wrong place.

In Newton's thought experiment about the rotating rocks going taut in deep space. With respect to what would the rocks be rotating?

If the rocks are in an otherwise empty universe with no other massive objects to relate to, then I guess you could use light as a frame of reference. If a laser is placed on one rock and aimed at a target on the other rock, the light would miss the target if the rocks are rotating. This is basically using a simple form of a Sagnac device to detect rotation.
 

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