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1d
accepted Can neutrons be synthesized purely from protons and electrons?
1d
revised Why does “closing speed” $>c$ not violate relativity's second postulate?
added 66 characters in body
1d
comment Why does “closing speed” $>c$ not violate relativity's second postulate?
Its because the closing speed relates to two particles. So, it never relates two photons or a particle and a photon?
1d
comment Why does “closing speed” $>c$ not violate relativity's second postulate?
@Hypnosifl: Of course; the second postulate applies to light.
1d
comment Why does “closing speed” $>c$ not violate relativity's second postulate?
@BenCrowell: I'm not asking about closing speed between particles but closing speed between, say, two photons or a particle and a photon.
1d
comment Doesn't the second postulate of special relativity imply the existence of “luminiferous ether”?
@BenCrowell: ¿Aren't these statements true: "sound is always propagated in air with a definite velocity $v_\mathrm{sound}$ which is independent of the state of motion of the emitting body." and "Any sound wave moves in the 'stationary' system of co-ordinates with the determined velocity $v_\mathrm{sound}$, whether the wave be emitted by a stationary or by a moving body." (All I did is substitute: light→sound, $c$→$v_\mathrm{sound}$, and "empty space"→"air".)
1d
asked Doesn't the second postulate of special relativity imply the existence of “luminiferous ether”?
1d
comment Why does “closing speed” $>c$ not violate relativity's second postulate?
@BenCrowell: Thanks, I've clarified it.
1d
revised Why does “closing speed” $>c$ not violate relativity's second postulate?
cleared up expression of 2nd Postulate
1d
comment Why does “closing speed” $>c$ not violate relativity's second postulate?
@New_new_newbie Yes, that's one "answer," but I would like another explanation. thanks
2d
revised Why does “closing speed” $>c$ not violate relativity's second postulate?
edited title
2d
asked Why does “closing speed” $>c$ not violate relativity's second postulate?
Oct
17
comment Does the Doppler effect disprove the constancy of $c$?
…it is indeed true that in this frame, the time for the light to get from the stern to the bow is L/(c+v). But it should be $c$ in all frames.
Oct
17
revised Does the Doppler effect disprove the constancy of $c$?
added 103 characters in body
Oct
17
revised Does the Doppler effect disprove the constancy of $c$?
added 103 characters in body
Oct
17
comment Does the Doppler effect disprove the constancy of $c$?
But you've got to show there is not a contradiction. How am I supposed to know whether your final equation implies a contradiction or not to your assumption $c=$const.?
Oct
17
comment Does the Doppler effect disprove the constancy of $c$?
@Sean: See my added explanation.
Oct
17
revised Does the Doppler effect disprove the constancy of $c$?
fixed a few typos
Oct
16
revised Does the Doppler effect disprove the constancy of $c$?
added 4 characters in body
Oct
16
asked Does the Doppler effect disprove the constancy of $c$?