Understanding Photon Velocity: Impact on Mass and Life Span Explained

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Discussion Overview

The discussion revolves around the relationship between photon velocity, mass, and time perception. Participants explore theoretical implications of photons traveling at the speed of light (C), including concepts of mass and lifespan, while addressing the nature of photons in the context of relativity.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests that if a photon is traveling at C, it may have increased mass compared to a photon that is "at rest."
  • Another participant clarifies that photons do not have a rest frame and cannot be at rest, indicating they have no sense of time.
  • Some participants agree that photons do not experience time, but one questions whether a photon observed from a stationary frame would appear to undergo time dilation, ultimately stating that photons can be destroyed in very short timeframes.
  • There is a consensus that photons exist only at the speed of light or not at all, and that their lack of rest mass contributes to their ability to reach C instantaneously.

Areas of Agreement / Disagreement

Participants generally agree on the nature of photons as massless entities that cannot be at rest and do not experience time. However, there is some debate regarding the implications of these properties on mass and lifespan, indicating unresolved questions in the discussion.

Contextual Notes

Limitations include the lack of a clear definition of "mass" in the context of photons and the implications of time dilation, which remain unresolved. The discussion also hinges on the interpretation of relativistic effects on mass and time.

YoungDreamer
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I am posting this under the belief that velocity affects mass and time, if my understanding is incorrect please correct it.

If a photon is traveling at C then theoretically does it have an increased mass compared to a photon that is "at rest"?

And if a photon is moving at C then does it have an infinite "life span"?
 
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It is obvious that a photon does not have a "sense" of time. But thanks for the link.
 
YoungDreamer said:
It is obvious that a photon does not have a "sense" of time. But thanks for the link.

I guess you're asking if a photon, observed by external 'stationary' (which will always be stationary to light's velocity of c) system appears to suffer time dilation, in this case infinite. Obviously no, because they can be destroyed in a matter of attoseconds and less.

But photons are massless and not party to the whole relativity time, length, mass thing anyway.
 
Pengwuino said:
Photons do not have a rest frame and cannot be at rest...

I agree. Photons exist only at c or not at all.
This curious phenomenon is not seen elsewhere in nature(to my understanding that is)

However, that fact that a photon has no "rest mass" helps, somewhat, in our query as to how it can go from 0 to c instantaneously.
 

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