Does Time Exist at the Speed of Light?

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SUMMARY

The discussion centers on the existence of time at the speed of light (c) and its implications for light's properties, particularly frequency. Participants challenge the notion that time does not exist at c, emphasizing that frequency, defined in Hertz, inherently requires time. They reference concepts such as time dilation, relativistic mass, and the Lorentz transform to argue that mass does not increase with velocity and that photons do not experience time in the same way as massive particles. The conversation highlights misconceptions surrounding these topics and encourages a return to fundamental principles of physics.

PREREQUISITES
  • Understanding of Einstein's theory of relativity
  • Familiarity with the Lorentz transform
  • Basic knowledge of time dilation and relativistic effects
  • Concept of frequency as it relates to light (Hertz)
NEXT STEPS
  • Research the implications of the Lorentz transform on time and mass at relativistic speeds
  • Study the concept of time dilation in detail and its effects on observers
  • Explore the relationship between energy and mass as described by E=mc²
  • Investigate the nature of photons and their behavior in different reference frames
USEFUL FOR

Physicists, students of physics, and anyone interested in the fundamental concepts of time, light, and relativity will benefit from this discussion.

  • #31


AWA said:
I'd like to say there's nothing wrong with the kind of questions people like dewaite asks,nobody should be put down for asking such questions. They are exactly the kind of questions that Einstein often asked himself from the age of 16 until he discovered special relativity and kept asking them all of his life.It is not metaphysics. Posts by Fredrik and Framedragger in this thread seemto me to be in that sense discouraging for newcomers or laypeople in physics.
Mryoung, I have had similar intuitions to what you describe,and I've always wind up thinking that in some way spacetime must be emergent and don't exist in the microscopic level but emerges in the macroscopic level. I always thought it was nonsense from my crazy imagination but recently string theorist Erik Verlinde has come up with a hypothesis in which spcetime as well as gravity are emergent. So maybe, but only maybe this thougth experiments are not so useless, inconsistent, deserving to be burned, etc

This is a common argument, "x, y, or z notable figure had wild theories too!" Yes... the difference is that for every world full of people, there are only a handful of Einsteins in a generation if at all. Of course, let's be fair to Einstein shall we, and aknowledge that he produced results before anyone bothered to listen to him. Interest in what he thought when he was a teenager waxed AFTER confirmation of Relativity by Eddington and others.

People ARE recognized for their genius, and in a world where Brian Greene can pump out novels about whatever version of String Theory he's into today, or Depak Chopra hasn't been trampled by hippos (personal dream). Being on shakey experimental ground, or proposing new theories (with evidence) isn't slammed the way it used to be... just ask Galilleo Gaililei. :wink:

If you want to put forward a radical new idea (ATM, whatever), you'd better lead with your math, or your experimental evidence, and NOT just a reformulation or bastardization of existing theories.

@Mryoung: I'm not trying to, and if I am insulting you I apologize. Another thread it is.
 
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  • #32


The only radical idea I try to put forward is that it is okay to discuss physical ideas in a forum about physics, and not just give answers out of the textbook which we all can read by ourselves, maybe I'm wrong but at least i would expect that from a physics forum.

BTW what's ATM?
 
  • #33


AWA said:
The only radical idea I try to put forward is that it is okay to discuss physical ideas in a forum about physics, and not just give answers out of the textbook which we all can read by ourselves, maybe I'm wrong but at least i would expect that from a physics forum.

BTW what's ATM?

"Against The Mainstream"
 
  • #34


AWA said:
The only radical idea I try to put forward is that it is okay to discuss physical ideas in a forum about physics, and not just give answers out of the textbook which we all can read by ourselves, maybe I'm wrong but at least i would expect that from a physics forum.

Please read the Physics Forums Global Guidelines which all members agree to abide by when they register to post here. You can find them by clicking on the word "Rules" at the top of every page here. Pay particular attention to the section Overly Speculative Posts.

Speculation is of course a part of scientific research, as an initial stage in formulating theories and hypotheses to test against experiment. However, PF is not a research forum. Its mission is educational, to help people understand physics (and other sciences) as it is currently being practiced. This includes new ideas that have been developed in the research community, have been published and are being debated there. It does not include generating our own speculations, or helping to promote speculations that are not part of current research.
 
  • #35


jtbell said:
Please read the Physics Forums Global Guidelines which all members agree to abide by when they register to post here. You can find them by clicking on the word "Rules" at the top of every page here. Pay particular attention to the section Overly Speculative Posts.

Speculation is of course a part of scientific research, as an initial stage in formulating theories and hypotheses to test against experiment. However, PF is not a research forum. Its mission is educational, to help people understand physics (and other sciences) as it is currently being practiced. This includes new ideas that have been developed in the research community, have been published and are being debated there. It does not include generating our own speculations, or helping to promote speculations that are not part of current research.

To be clear, speculations within the context of a friendly discussion are one thing, compared to starting threads dedicated to some random conjecture? I hope? The rule I assume one lives by is that you try not to be overly tangential, and not at all if you're being speculative, and not to begin with pseudoscience. Please correct me if I'm mistaken.
 
  • #36


AWA said:
I'd like to say there's nothing wrong with the kind of questions people like dewaite asks,nobody should be put down for asking such questions. ...

great to see someone sharing my idea. but i was reminded of the rules.
 
  • #37


Frame Dragger said:
@Mryoung: I'm not trying to, and if I am insulting you I apologize. Another thread it is.

Look, i really apologize for putting my idea forward, it won't happen again promise.
I want to believe that you do not want to insult anyone but your choice of words... ahhh..

i'll just leave you guys...
 

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