Relativity

1985 topics in this forum

1. What is Space made of? 1 2 3 4 16

   By Mordred, May 31, 2015
   • 392 replies
   • 79.4k views
   • 
   • Mordred
   • August 25

2. Is such a flaw conceivable in GR?

   By externo, 3 hours ago
   • 1 reply
   • 52 views
   • 
   • Mordred
   • 3 hours ago

3. How do we measure the degree of "change" between 2 systems?

   By geordief, Thursday at 07:18 PM
   • 12 replies
   • 171 views
   • 
   • swansont
   • Thursday at 10:35 PM

4. Neutral simultaneity for two frames. 1 2 3 4 9

   By DimaMazin, December 9, 2022
   • 202 replies
   • 13.4k views
   • 
   • Mordred
   • Tuesday at 02:03 AM

5. Is rapidity a measure of acceleration?

   By md65536, April 19
   • 24 replies
   • 1.5k views
   • 
   • Mordred
   • November 2

6. Taking my girlfriend to Alpha Centauri on the Millennium Falcon 2 1 2

   By Gian, October 24
   • 27 replies
   • 729 views
   • 
   • Halc
   • October 31

7. What does light feel about its motion?

   By Munim, October 6
   • 15 replies
   • 615 views
   • 
   • timothy123
   • October 27

8. The closer to the speed of light, the more length contraction in the direction of motion (SRT). 1 2 3

   By Maartenn100, October 3
   • 60 replies
   • 2.6k views
   • 
   • Halc
   • October 23

9. Length contraction in a doughnut shaped universe.

   By grayson, April 1
   • 7 replies
   • 1k views
   • 
   • studiot
   • September 14

10. Final Parsec Problem

    By MigL, July 31
    • 6 replies
    • 775 views
    • 
    • Mordred
    • August 22

11. Gullstrand–Painlevé coordinates 1 2 3

    By externo, July 27
    • 50 replies
    • 1.8k views
    • 
    • Mordred
    • August 3

12. Gravity drive

    By Dmitriy, July 21
    • 7 replies
    • 660 views
    • 
    • Dmitriy
    • July 21

13. Alcubierre Warp Drives and Strong Gravity Fields

    By GeeKay, July 14
    • 12 replies
    • 782 views
    • 
    • MigL
    • July 17

14. Astrogeomanity: A Comprehensive Framework for Human Evolution in Space

    By Daniel Dux, July 7
    • 2 replies
    • 624 views
    • 
    • swansont
    • July 8

15. Proof that Einstein Special relativity is false because light is not isotropic in all reference frames.

    By externo, June 26
    • 5 replies
    • 723 views
    • 
    • swansont
    • June 26

16. Why didn't gravity seem to be understood before if there were scales?

    By Wigberto Marciaga, May 30
    • 3 replies
    • 808 views
    • 
    • swansont
    • May 30

17. Combined speeds at relativistic velocities 1 2

    By Moontanman, May 1
    • 32 replies
    • 1.7k views
    • 
    • Ghideon
    • May 2

18. Twin paradox with a twist

    By DanMP, April 25
    • 19 replies
    • 1.3k views
    • 
    • DanMP
    • May 2

19. The equivalence principle and blueshift

    By DanMP, April 25
    • 12 replies
    • 1k views
    • 
    • Markus Hanke
    • April 30

20. How does a physical system evolve under acceleration?

    By geordief, April 28
    • 12 replies
    • 972 views
    • 
    • swansont
    • April 29

21. Calculating time for light clock time dilation ?

    By jv1, April 19
    • 13 replies
    • 1.2k views
    • 
    • swansont
    • April 20

22. The spacetime interval versus a chain of causative events

    By geordief, April 8
    • 21 replies
    • 1.6k views
    • 
    • Halc
    • April 16

23. Is the spacetime model necessary between frames that are relatively stationary?

    By geordief, March 28
    • 4 replies
    • 858 views
    • 
    • swansont
    • March 28

24. A different way of looking at the trampoline analogy

    By geordief, March 17
    • 23 replies
    • 1.8k views
    • 
    • Mordred
    • March 23

25. Material Falling Onto Neutron Stars

    By RyanJ, March 14
    • 6 replies
    • 981 views
    • 
    • RyanJ
    • March 16