Modern and Theoretical Physics

2433 topics in this forum

1. Hands-on planck units tutorial 1 2

   By Martin, January 10, 2009
   • 30 replies
   • 38k views
   • 
   • imatfaal
   • April 5, 2017

2. Universal Concept of Time (Is the Big Bang wrong?) 1 2

   By lucien216, January 29, 2020
   • 30 replies
   • 169.1k views
   • 
   • joigus
   • July 15, 2020

3. Hypothetical "Spaceless" Universe 1 2

   By Anchovyforestbane, November 17, 2020
   • 27 replies
   • 128.1k views
   • 
   • Anchovyforestbane
   • November 20, 2020

4. What's the opposite of entropy? 1 2 3

   By gib65, December 10, 2004
   • 57 replies
   • 91.6k views
   • 
   • John Cuthber
   • December 23, 2017

5. Does a photon have physical volume or geometrical size? 1 2

   By madscience, November 12, 2007
   • 32 replies
   • 76.8k views
   • 
   • johnnymckiernan
   • December 23, 2010

6. Does a magnetic field have mass? 1 2 3 4 7

   By MPMin, August 31, 2019
   • 156 replies
   • 67.5k views
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   • swansont
   • September 27, 2019

7. Photon propulsion (split from 3 facts maybe you don't know about antimatter) 1 2

   By Curious layman, July 10, 2019
   • 27 replies
   • 60k views
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   • zapatos
   • July 12, 2019

8. I want to become a self-taught theoretical physicist 1 2 3

   By theoreticalphysicist, February 1, 2013
   • 58 replies
   • 48.3k views
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   • steveupson
   • February 18, 2017

9. Small to Large? [Split from What determined the inital state of the universe?] 1 2

   By AbstractDreamer, May 16, 2020
   • 41 replies
   • 46.1k views
   • 
   • joigus
   • May 29, 2020

10. What's the effect of temperature on extrinsic semiconductors???

    By MCR, March 29, 2006
    • 8 replies
    • 35.8k views
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    • 5614
    • March 29, 2006

11. Light: visible or invisible? 1 2 3 4 17

    By The_Believer1, February 22, 2016
    • 416 replies
    • 34.8k views
    • 
    • Phi for All
    • March 12, 2018

12. The Antiphoton 1 2 3 4

    By Kyrisch, October 22, 2008
    • 79 replies
    • 31.6k views
    • 
    • Mystery111
    • September 1, 2011

13. Can you move in space? 1 2 3 4 17

    By MPMin, July 2, 2019
    • 416 replies
    • 25.9k views
    • 
    • swansont
    • July 23, 2019

14. What makes an electron orbit? 1 2 3 4 9

    By QuestionMark, March 28, 2012
    • 211 replies
    • 23.7k views
    • 
    • hypervalent_iodine
    • May 10, 2012

15. A simple homemade Atomic Reactor 1 2 3 4 6

    By YT2095, January 15, 2004
    • 141 replies
    • 23.5k views
    • 
    • nitric
    • September 7, 2008

16. An Exceptionally Simple Theory of Everything 1 2

    By D H, November 10, 2007
    • 28 replies
    • 20k views
    • 
    • solidspin
    • December 8, 2007

17. Does Infinity exist in nature 1 2 3

    By adam SA, January 26, 2010
    • 57 replies
    • 19.6k views
    • 
    • PlatinumZr0
    • August 30, 2010

18. Can a "white piece of paper" reflect light???

    By Iwonderaboutthings, April 10, 2014
    • 23 replies
    • 19.3k views
    • 
    • Iwonderaboutthings
    • April 16, 2014

19. 5 Types of Teleportation

    By Whitestar, May 18, 2004
    • 10 replies
    • 19.2k views
    • 
    • Tesseract
    • May 21, 2004

20. How does a body "know" how to move??!! 1 2 3 4 7

    By Rasher Null, October 6, 2016
    • 171 replies
    • 19k views
    • 
    • steveupson
    • May 2, 2017

21. Is Time Really The Fourth Dimension??? 1 2 3 4 5

    By Physics5000, April 30, 2003
    • 111 replies
    • 18.5k views
    • 
    • radienx000
    • November 12, 2009

22. source of earth's gravity... 1 2 3 4 5

    By mak10, November 10, 2004
    • 107 replies
    • 18.4k views
    • 
    • Saint
    • March 3, 2005

23. Radioactive Decay is Causeless? 1 2 3

    By foofighter, February 28, 2008
    • 72 replies
    • 17.9k views
    • 
    • Klaynos
    • May 17, 2008

24. Inertia - throwing a ball off of a moving train 1 2

    By themad2, November 9, 2004
    • 28 replies
    • 17.7k views
    • 
    • michel123456
    • March 18, 2020

25. Faraday's Cage 1 2 3 4 6

    By 5614, August 3, 2004
    • 143 replies
    • 17.7k views
    • 
    • Lance
    • March 23, 2005