Recent content by Bellaella
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Undergrad Black hole and coordinate time from the perspective of Alice outside
@PeterDonis @Nugatory @PeroK @Ibix @Dale Thank you so much for bearing with me and answering my questions even though sometimes they weren't entirely physical 🤗 I liked all your posts because each one helped me understand the problem better. I really appreciate it! You can close the thread now!- Bellaella
- Post #24
- Forum: Special and General Relativity
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Undergrad Black hole and coordinate time from the perspective of Alice outside
Thank you everyone for your input. I understand everything you guys said except one single sentence is still confusing me which is the following: Why may not the time coordinate assigned to an event be equal to the time displayed by their clock at that event? After all Alice has synchronized...- Bellaella
- Post #22
- Forum: Special and General Relativity
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Undergrad Black hole and coordinate time from the perspective of Alice outside
Just to sum everything up and check if my understanding is right: Are you saying this could be the case if Alice knew the specifications of Bobs spaceship (if he had one)? Otherwise I don't know how there could be a point still outside the EH that wouldn't allow Bob to avoid falling into the...- Bellaella
- Post #17
- Forum: Special and General Relativity
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Undergrad Black hole and coordinate time from the perspective of Alice outside
Yes exactly. I'm talking about the region outside that as well. That'd mean they're spacelike separated but nevertheless they're still part of the same spacetime manifold. That region outside that is also the reality I'm referring to. Even though they're space like separated they're part of the...- Bellaella
- Post #10
- Forum: Special and General Relativity
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Undergrad Black hole and coordinate time from the perspective of Alice outside
I tried to describe my understanding of "reality" above. To quickly sum it up its the thing I can draw on my sheet of paper. The whole universe is on there and the manifold described by the coordinates I chose which includes the interior of the BH and the exterior. The fact that Bob and Alice...- Bellaella
- Post #9
- Forum: Special and General Relativity
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Undergrad Black hole and coordinate time from the perspective of Alice outside
Haha right. The thing is I was looking most of the time on the Kruskal-Szekeres coordinate system and that's the one I'm most familiar with at the moment. I want to keep that one for now to avoid confusion. After all I read it shouldn't matter what coordinate system I choose. I might choose a...- Bellaella
- Post #8
- Forum: Special and General Relativity
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Undergrad Black hole and coordinate time from the perspective of Alice outside
Yeah good point! To be honest I found a post online that inspired me to ask this question because I didn't know exactly what to think of that myself. Its difficult for me to define what I mean by "reality" because I thought of it more like a "thought experiment". I can't write a proper...- Bellaella
- Post #7
- Forum: Special and General Relativity
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Undergrad Black hole and coordinate time from the perspective of Alice outside
Hello everyone!:) This is my first post on here. I'm having trouble understanding what is real for Alice. I looked at different physics websites and there seem to be only a few questions addressing this some of which I don't understand. I thought maybe I'll get some clarity here if I ask my own...- Bellaella
- Thread
- Black hole Event horizon General relativity Singularity
- Replies: 26
- Forum: Special and General Relativity