Discussion Overview
The discussion revolves around the nature of time as it relates to photons and the implications of relativity. Participants explore the concept of time for light and photons, questioning how time behaves at the speed of light and the relationship between time and the existence of photons from distant sources.
Discussion Character
Main Points Raised
- One participant asserts that if relativity is true, then photons from a billion light years away would not exist in the present unless they stopped for a billion years after reaching Earth.
- Another participant counters that time does not apply to photons, stating that since no clock can travel at the speed of light, the concept of time stopping at that speed is meaningless.
- A different viewpoint suggests that photons do experience time, arguing that if spacetime exists, anything moving through space would experience time, and questioning the nature of time if all clocks were destroyed.
- One participant raises a question about the relationship between photons as time-variant electric and magnetic fields and the claim that they do not experience time, indicating confusion over this concept.
Areas of Agreement / Disagreement
Participants express conflicting views on whether photons experience time, with no consensus reached. Some argue that photons do not experience time, while others believe they do, leading to an unresolved debate.
Contextual Notes
There are limitations in the discussion regarding the definitions of time and spacetime, as well as the implications of relativity on the nature of photons. The assumptions underlying these claims remain unresolved.