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# Posts tagged special-relativity

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5 posts
50%
+1 −1

Which one is correct? $$E=mc^2$$ or $$E^2=(mc^2)^2+(pc)^2$$ I mostly seen $$E=mc^2$$ from my childhood, and when I was learning problem solving in relativistic mechanics I had seen $$E^2=(mc^2)^2... 1 answer · posted 2y ago by deleted user · edited 2y ago by deleted user 60% +1 −0 All given metrics are for orthonormal-basis. 2 dimensional spacetime : I saw that Minkowski Metric looks like this :$$\pmatrix{-1 & 0 \\ 0 & 1}$$or$$\pmatrix{1 & 0 \\ 0 & -1}...

1 answer  ·  posted 2y ago by deleted user  ·  edited 2y ago by deleted user

66%
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I was reading about Ether, Maxwell and Young-double-slit experiment. I got a question about Ether law. Let me say what I read about Ether Law. Suppose, a boat is traveling with Adverse of Water ...

2 answers  ·  posted 2y ago by A person who doesn't know anything‭  ·  edited 2y ago by A person who doesn't know anything‭

80%
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I asked this question on Stack Exchange, and didn't get an answer, but maybe someone here will be able to help. In non-relativistic quantum mechanics, the normalization condition for position eige...

1 answer  ·  posted 3y ago by Technically Natural‭  ·  last activity 3y ago by Derek Elkins‭

81%
+7 −0

In special relativity, spacetime coordinates are normally given as $$(ct, x, y, z) \tag{S}$$ with the metric being either $$g = \operatorname{diag}(-1,1,1,1) \tag{+}$$ or g = \operatorname{d...

1 answer  ·  posted 3y ago by celtschk‭  ·  last activity 3y ago by dmckee‭