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yesterday vote accept Lem n
yesterday comment added infinitezero No need to go relativistic. Alice is at a train station and Bob is travelling in a train, northbound. Both observe the ongoing train, southbound.
2 days ago history became hot network question
2 days ago answer added TheKings 21L timeline score: 7
2 days ago comment added Lem n Thank you controlgroup. If anyone is reading from the future, I apologize that the title is inaccurate. Red/Blueshifting changes the frequency of light and given the same amplitude should have less/more energy respectively.
2 days ago history edited Qmechanic CC BY-SA 4.0
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2 days ago vote accept Lem n
yesterday
2 days ago vote accept Lem n
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2 days ago vote accept Lem n
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2 days ago vote accept Lem n
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2 days ago vote accept Lem n
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2 days ago vote accept Lem n
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2 days ago vote accept Lem n
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2 days ago comment added controlgroup "Energy" is a scalar coordinate quantity. The true coordinate-invariant conserved quantity is the stress-energy-momentum tensor, which obeys $\nabla_\mu T^{\mu\nu}=0$.
2 days ago answer added Sten timeline score: 17
2 days ago history edited Lem n CC BY-SA 4.0
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2 days ago history edited Lem n CC BY-SA 4.0
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S 2 days ago review First questions
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S 2 days ago history asked Lem n CC BY-SA 4.0