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Relativity

For discussion of problems relating to special and general relativity.

1991 topics in this forum

  1. A Possible Method to Solve Twin Paradox in Micro-Gravitational Field

    By DongchengZhao,
    • 3 replies
    • 955 views

  2. The energy of the Universe 1 2

    By geordief,
    • 40 replies
    • 4.1k views

  3. Black hole theory

    By Eno_Phmann,
    • 3 replies
    • 879 views

  4. Adding spacetime curvatures

    By geordief,
    • 8 replies
    • 1.2k views

  5. Work of fiction

    By Yamigaza,
    • 0 replies
    • 631 views

  6. The spacetime curvature of a body such as the Solar System as experienced from the outside

    By geordief,
    • 10 replies
    • 957 views

  7. Gravity wells (split from A Question for Curved Spacetime)

    By geordief,
    • 14 replies
    • 1.6k views

  8. A Question for Curved Spacetime. 1 2 3 4 6

    By J.Merrill,
    • 135 replies
    • 10.4k views

  9. Why is the time axis in a space-time diagram a distance 1 2

    By Caruthers,
    • 27 replies
    • 3.8k views

  10. Gyroscope in a curved space

    By Genady,
    • 6 replies
    • 1.3k views

  11. What would the effects of an artificial gravity well/hole/ledge be? (Thought experiment)

    By Zerilia,
    • 5 replies
    • 1.1k views

  12. What is exactly up and down (unfinished)

    By CMaranon9.8,
    • 8 replies
    • 1.9k views

  13. Objective Frame of Reference

    By strontium,
    • 12 replies
    • 2k views

  14. Time

    By strontium,
    • 3 replies
    • 871 views

  15. Curvature in space-time is shown as a "fabric" 1 2 3

    By pmourad,
    • 63 replies
    • 8.8k views

  16. Weekend smileteaser.

    By studiot,
    • 2 replies
    • 846 views

  17. Gravity as refraction

    By rjbeery,
    • 1 reply
    • 826 views

  18. Does a Static EM Field Acquire Mass Due to Stored Energy? 1 2 3

    By exchemist,
    • 71 replies
    • 7k views

  19. THE WORLD’S FIRST WARP BUBBLE FINALLY CREATED?

    By beecee,
    • 9 replies
    • 3.3k views

  20. Does length contraction imply a superposition of particles? [answered: no] 1 2 3 4

    By 34student,
    • 90 replies
    • 8.4k views

  21. Is the block universe just a whole bunch of world lines (from the elementary particles)? 1 2 3

    By 34student,
    • 55 replies
    • 5.9k views

  22. Could someone please explain that although we are told the universe is expanding.

    By Geniuscfcp,
    • 4 replies
    • 1.3k views

  23. Requirement for two "nows" to grasp the idea of Simultaneity 1 2

    By tar,
    • 39 replies
    • 4.2k views

  24. Quick relativity of simultaneity and length contraction thought experiment

    By md65536,
    • 5 replies
    • 1.1k views

  25. Length contraction in a block universe must be an illusion 1 2 3 4 6

    By 34student,
    • 139 replies
    • 12.2k views
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