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Hi /sci/
I learned in optics that group and phase velocities can be above the speed of light in vacuum.
I understand the argumentation stating that no information can be transferred via those only, but it conflicts with my understanding of special relativity.
If I were observing a point on a wave which moves with the phase velocity, how would it look like to me? I would say the γ factor would be imaginary, which gets me confused
Where is my mistake?
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>>8480094
I have no idea but at least I can tell you that I'm kind of sure that 4chan is not the perfect site for such a question.
Very cute cat though.
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>>8480094
https://en.wikipedia.org/wiki/Faster-than-light#Phase_velocities_above_c
https://en.wikipedia.org/wiki/Faster-than-light#Group_velocities_above_c
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>>8480156
Well I thought /sci/ WAS the right place
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>>8480174
Probably the best board on this site for this question yes.
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>>8480159
Yeah I've read that one, however what if I for example had a material that lights up depending on wave amplitude so that I could track the maxima as they move through it
How does this not clash with special relativity?
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