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comment What technology can result from such expensive experiment as undertaken in CERN?
- Mr. Faraday, your experiment is kinda cool and all but can I make a multibillion dollar industry out of that? - Well, lets wait a hundred years.
Aug
27
comment Why should any physicist know, to some degree, experimental physics?
@MattReece In the sense that ultimately physics, as all sciences, must be about the real world. Sure we all have a sense of beauty and elegance and we like to transpose that into our theories but what really should matter is if those theories might or not explain the universe, as such be able to be falsifiable. So a "proper" theoretical physicist should always have that in the back of its head or it just dwells in the fantastic, and to me that is not doing science.
Aug
27
awarded  Popular Question
Aug
27
awarded  Nice Question
Aug
26
comment Why should any physicist know, to some degree, experimental physics?
+1 Nice examples. Your point was basically what I meant with my first point.
Aug
26
asked Why should any physicist know, to some degree, experimental physics?
Aug
14
comment Why is the Schwarzschild radius the radius of an event horizon?
I laughed so much. Thank you for your time. I'll check Physics SE later, then.
Aug
13
comment Why is the Schwarzschild radius the radius of an event horizon?
Btw, just to make sure I understand what you're saying: when you say that, for example, $U$ is spacelike you're saying that if I consider curve, say, $c$, parameterized by a parameter $\lambda$, given by the parametric equations $c(\lambda)=(c^v,c^u,c^\theta,c^\phi)$ whose tangent vector is $\dot{c}(\lambda)=(0,\dot{c^u},0,0)$ then $c^uc_u>1$?
Aug
13
comment Why is the Schwarzschild radius the radius of an event horizon?
I believe that your answer is by far the most complete so I'm inclined to set it as the correct answer. Nevertheless, I'm having an hard time figuring out how do you know that the coordinate $U$ is spacelike for $r>2M$ and timelike otherwise. Do you conclude that from the expressions for $U$? Because I can't see it. Another problem am having is figuring out why does the fact that $U$ is timelike in the interior region implies that the light cone always point to the singularity.
Aug
13
revised Why is the Schwarzschild radius the radius of an event horizon?
edited title
Aug
13
asked Why is the Schwarzschild radius the radius of an event horizon?
Jun
5
revised Influence of charged particle's own electric field on itself
deleted 4 characters in body
Apr
10
accepted Could a tetraquark $q \bar{q} q \bar{q}$ be colorless?
Apr
9
revised Could a tetraquark $q \bar{q} q \bar{q}$ be colorless?
edited title
Apr
9
comment Could a tetraquark $q \bar{q} q \bar{q}$ be colorless?
@innisfree That was my doubt, yes. But you answered it in you first comment.
Apr
9
comment Could a tetraquark $q \bar{q} q \bar{q}$ be colorless?
But then it can't be color neutral if it's composed by $c \bar{c}d \bar{u}$. I thought all hadrons had to be neutral.
Apr
9
asked Could a tetraquark $q \bar{q} q \bar{q}$ be colorless?
Apr
9
comment Why doesn't our body gets crushed due to the atmospheric pressure?
@EnosOye It was a cartoon plus the sphere was made of a very weak material. =p
Apr
9
comment Why doesn't our body gets crushed due to the atmospheric pressure?
Once I saw a cartoon where the main character thought that taking the air out of a sphere would make it float. The sphere collapsed.
Jan
30
awarded  Enthusiast