I Alive in one frame and dead relative to other?

I
Thread starter ahmadphy
Start date Feb 27, 2025
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Electrical Photon Simultaneity

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The discussion revolves around a thought experiment involving simultaneity in relativity, where a photon triggers a lethal shock upon arrival at a device. The key point is that while one observer sees the photon arrive and the person die, a moving observer perceives the photon arriving later due to the relativity of simultaneity. Participants clarify that the emission of the photon is simultaneous in all frames, but its arrival is not, leading to different conclusions about the person's fate in each frame. Ultimately, both observers agree that the man dies, but the timing and coordinates of that event differ based on their relative motion. The conversation emphasizes the importance of clearly defining scenarios in discussions of relativity.

Mar 1, 2025

Herman Trivilino

Science Advisor

Gold Member

ahmadphy said:

The idea was made clear I'm not going to explain myself again because that's no sense I think if u read the last 7 comments u would have understand the scenario and again forgive my bad English

Perhaps the reason people don't understand the scenario is your bad English! We can forgive your bad English, but please don't expect us to have understood what you wrote when we are clearly asking you to explain yourself.

Does it take the arrival of both photons at the same time to set off the bomb? If so, that is a single event and as such if it is observed to happen then all observers will agree on it. But then they can't agree that the photons were emitted simultaneously at two different locations along the line of relative motion.

If two events have a spacelike separation then they may be simultaneous in one frame, but not in another.