Relativity

1985 topics in this forum

1. The nature of space and time

   By Sarki, May 6, 2023
   • 2 replies
   • 776 views
   • 
   • swansont
   • May 6, 2023

2. ... paradox help needed ...

   By zetetic56, April 25, 2023
   • 10 replies
   • 1.3k views
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   • zetetic56
   • April 26, 2023

3. Paradox? (split from Is FTL actually possible?) 1 2 3

   By Genady, April 8, 2023
   • 64 replies
   • 4.4k views
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   • studiot
   • April 12, 2023

4. If the Earth was made of gruyere cheese...

   By geordief, March 27, 2023
   • 4 replies
   • 727 views
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   • Markus Hanke
   • March 28, 2023

5. Gravitational waves inside the Earth(or similar object) 1 2

   By geordief, March 20, 2023
   • 30 replies
   • 2.1k views
   • 
   • Markus Hanke
   • March 21, 2023

6. Re imagining the trampoline analogy

   By geordief, March 19, 2023
   • 1 reply
   • 599 views
   • 
   • Markus Hanke
   • March 20, 2023

7. Momentum and spacetime curvature 1 2

   By geordief, March 8, 2023
   • 32 replies
   • 2.7k views
   • 
   • Genady
   • March 19, 2023

8. Twin paradox (split from Hijack from Jumping out of the black hole)

   By MJ kihara, March 14, 2023
   • 5 replies
   • 770 views
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   • Phi for All
   • March 15, 2023

9. Logic and illogic make up the string.

   By deema, March 14, 2023
   • 1 reply
   • 395 views
   • 
   • Phi for All
   • March 14, 2023

10. Expansion of the universe or contraction of scale?

    By katahiromz, March 6, 2023
    • 14 replies
    • 1.4k views
    • 
    • Genady
    • March 7, 2023

11. Recording or perceiving the activity of an oncoming object

    By geordief, March 2, 2023
    • 17 replies
    • 1.1k views
    • 
    • Genady
    • March 4, 2023

12. Lorentz transformations btw rotating frames of reference

    By geordief, February 25, 2023
    • 5 replies
    • 735 views
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    • md65536
    • February 26, 2023

13. coming apart from

    By Ibrahim Sanad, February 22, 2023
    • 2 replies
    • 530 views
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    • Lorentz Jr
    • February 22, 2023

14. The twin Paradox revisited 1 2 3 4 9

    By Awatso, February 10, 2023
    • 204 replies
    • 10.1k views
    • 
    • martillo
    • February 20, 2023

15. What would happen to time if we could travel faster than light?

    By dimreepr, December 10, 2022
    • 7 replies
    • 1.1k views
    • 
    • Janus
    • February 20, 2023

16. The speed of light and causality 1 2

    By geordief, February 9, 2023
    • 40 replies
    • 2.3k views
    • 
    • Boltzmannbrain
    • February 20, 2023

17. Mass and Energy-Momentum

    By geordief, July 2, 2022
    • 16 replies
    • 1.5k views
    • 
    • studiot
    • February 6, 2023

18. Can a material object cross the event horizon of the Black Hole?

    By rirakib, February 2, 2023
    • 6 replies
    • 907 views
    • 
    • md65536
    • February 5, 2023

19. Why do we need a graviton?

    By DannyWalter, April 22, 2022
    • 7 replies
    • 1.3k views
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    • Tutoroot
    • February 3, 2023

20. Light has no mass because gravity and light travel at the same speed, true or false?

    By Jalopy, March 3, 2022
    • 12 replies
    • 1.6k views
    • 
    • Tutoroot
    • February 3, 2023

21. What is the smallest object with mass?

    By geordief, June 27, 2022
    • 16 replies
    • 1.6k views
    • 
    • Tutoroot
    • February 3, 2023

22. Why does gravity cause acceleration?

    By Fly135, September 14, 2022
    • 3 replies
    • 911 views
    • 
    • Tutoroot
    • February 3, 2023

23. Einstein Light Clock Conundrum 1 2 3

    By Otto Nomicus, January 25, 2023
    • 55 replies
    • 3.5k views
    • 
    • studiot
    • January 29, 2023

24. Time and relativity (split from The Nature of Time) 1 2 3 4 5

    By DanMP, December 27, 2022
    • 104 replies
    • 6.5k views
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    • Ghideon
    • January 22, 2023

25. GPS timing (from Time and relativity (split from The Nature of Time))

    By swansont, January 12, 2023
    • 3 replies
    • 420 views
    • 
    • StringJunky
    • January 13, 2023