Relativity

1986 topics in this forum

1. Inertial observers measuring an object's acceleration...

   By KipIngram, May 13, 2017
   • 4 replies
   • 1.7k views
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   • KipIngram
   • May 14, 2017

2. Albert Einstein and the cosmological constant 1 2

   By David Levy, May 5, 2017
   • 41 replies
   • 6.9k views
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   • swansont
   • May 10, 2017

3. Is time a property of space or the fields within it? 1 2

   By StringJunky, April 20, 2017
   • 37 replies
   • 4.8k views
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   • KipIngram
   • May 9, 2017

4. Math of relativistic mass different from that of rest mass ? 1 2 3

   By koti, May 1, 2017
   • 54 replies
   • 6.6k views
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   • koti
   • May 7, 2017

5. diagonal motion "paradox" 1 2

   By Thales et al, April 23, 2017
   • 28 replies
   • 9.2k views
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   • Mike-from-the-Bronx
   • May 4, 2017

6. Lorentz Transformations (split from why nothing >c) 1 2 3 4 6

   By David Levy, April 20, 2017
   • 132 replies
   • 15.3k views
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   • David Levy
   • May 3, 2017

7. Relativistic momentum

   By suyash, April 15, 2017
   • 13 replies
   • 2.3k views
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   • swansont
   • April 28, 2017

8. Why nothing can go faster than speed of light. 1 2 3 4 7

   By Robittybob1, March 6, 2016
   • 152 replies
   • 19.3k views
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   • swansont
   • April 24, 2017

9. Can energy move faster than light?

   By funker, March 8, 2017
   • 15 replies
   • 2.2k views
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   • imatfaal
   • April 23, 2017

10. Universal 'Now' at Time-Zero 1 2 3 4 9

    By StringJunky, August 16, 2016
    • 219 replies
    • 23.4k views
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    • Pugdaddy
    • April 19, 2017

11. Another take on the twins paradox (split)

    By DanMP, April 7, 2017
    • 15 replies
    • 2.3k views
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    • madmac
    • April 13, 2017

12. Time dilation with 3 bodies

    By Dcallagh, March 28, 2017
    • 5 replies
    • 1.5k views
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    • KipIngram
    • April 11, 2017

13. Time, light and the future

    By Samedgar2001, April 3, 2017
    • 2 replies
    • 1.1k views
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    • mistermack
    • April 4, 2017

14. A question about the present! 1 2 3 4 8

    By JohnLesser, April 2, 2017
    • 175 replies
    • 15.8k views
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    • Phi for All
    • April 4, 2017

15. Gravitational time dilation near Earth 1 2

    By DanMP, March 3, 2017
    • 44 replies
    • 5.9k views
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    • zztop
    • March 27, 2017

16. Covariants, Contra-variants, Invariants, Variants in SR?

    By TakenItSeriously, August 14, 2016
    • 11 replies
    • 3.2k views
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    • KipIngram
    • March 26, 2017

17. the speed of shadows

    By substitutematerials, December 18, 2016
    • 23 replies
    • 4.5k views
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    • Daecon
    • March 25, 2017

18. i need some validation to an idea I have

    By Eaurrua, September 25, 2016
    • 6 replies
    • 2.2k views
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    • KipIngram
    • March 24, 2017

19. Is it possible for some creatures to experience time faster or slower?

    By Anatanoshi, March 3, 2017
    • 13 replies
    • 2.3k views
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    • madmac
    • March 20, 2017

20. What is Einstein's equation used for?

    By awarnes, March 18, 2017
    • 5 replies
    • 1.7k views
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    • timo
    • March 18, 2017

21. An improvement on Redshift?

    By mistermack, March 15, 2017
    • 2 replies
    • 1.9k views
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    • mistermack
    • March 15, 2017

22. Pushing a light year-long stick

    By Lord Antares, February 22, 2017
    • 11 replies
    • 3.2k views
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    • mistermack
    • March 8, 2017

23. Photon time

    By DanMP, March 3, 2017
    • 14 replies
    • 2.4k views
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    • Bender
    • March 8, 2017

24. Invariance of the speed of light 1 2 3

    By geordief, January 5, 2017
    • 65 replies
    • 9.1k views
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    • swansont
    • February 25, 2017

25. Speed of Gravity 1 2

    By Lord Antares, February 22, 2017
    • 29 replies
    • 3.9k views
    • 
    • imatfaal
    • February 25, 2017