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  • 17 votes cast
Mar
14
asked What would you see standing on black hole just above the event horizon ? Will you look through past and future of the universe?
Mar
12
awarded  Scholar
Mar
12
accepted How can we say time began at big bang?
Mar
12
accepted Head on collision of two black holes
Mar
12
comment Why does antimatter and matter fuse to release energy even though they will cancel each other perfectly?
One more thing , when you talk about negative momentum, is it mass or velocity opposite to each other?
Mar
12
comment Why does antimatter and matter fuse to release energy even though they will cancel each other perfectly?
Sorry I could not understand that equation [ I am not physics folk ]. I just have very much liking in the field of physics but chose softwares. Please help me understand.
Mar
12
awarded  Commentator
Mar
12
comment Why does antimatter and matter fuse to release energy even though they will cancel each other perfectly?
In the frame you talked about where they have equal and opposite momentum when they fuse together will their kinetic energy/rest energy results into release of energy? I just want to know where this huge energy comes from. I am assuming momentum and electric charge cancel out completely.
Mar
10
comment Why does antimatter and matter fuse to release energy even though they will cancel each other perfectly?
@All: Say we consider matter as just a form a energy, does antimatter a form of anti-energy/negative energy? If yes what is the by-product of fusion energy and anti-energy?
Mar
10
asked Why does antimatter and matter fuse to release energy even though they will cancel each other perfectly?
Feb
27
comment How can we say time began at big bang?
Is the time also expanding along with space?
Feb
27
comment How can we say time began at big bang?
I got your explanation about 4d model but I have some queries about expansion after big bang, I have updated my question to include them, I am not sure if that is answerable but if we say space and time is expanding then it must have some reference outside the 4d model to prove it. What do you say?
Feb
27
revised How can we say time began at big bang?
added 1050 characters in body
Feb
27
comment How can we say time began at big bang?
I would like argue with a point you have made about nothing exist before big bang. If there was nothing big bang wouldn't have instantiated to form the universe. Once you say that universe has instantiated you inherently assume presence of time in some form before universe began. I know it's a kind of logical deadlock but we have to solve it if we really want to understand space and time. I believe if human mind can think and ask questions about before big bang, something has to be there before the big bang, It's just the matter of comprehending it in our brain in the form of mathematical equa
Feb
23
comment How can we say time began at big bang?
@Igael: I have just put out the question short to communicate maximum information in minimum reading. Maybe I will edit the title if I change my thought.
Feb
23
awarded  Editor
Feb
23
revised How can we say time began at big bang?
deleted 29 characters in body
Feb
23
comment How can we say time began at big bang?
So if time began at the big bang, process of beginning of time would have consumed some finite time which in turn means time already present before it's own beginning.
Feb
23
asked How can we say time began at big bang?
Nov
25
asked Head on collision of two black holes