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Long-awaited mathematics proof could help scan Earth's innards
- kurthr 10y agoThat's too bad... because he's also disproved the cloak of invisibility! In fact, I suspect this sort of proof may be useful to other fields of tomography (eg CT / MRI) beyond UltraSound, if it really improves complete imaging knowing only shortest (eg highest index) paths from the surface. I guess the sparseness helps minimize errors faster than current techniques, although it's not clear to me how that necessarily follows from the mathematical proof.
- _nalply 10y agoInteresting idea about invisibility being disproved. Could you flesh out this idea in more detail?
- XorNot 10y agoIf time-of-flight is the only necessary information to discover an objects structure, then all cloaking can be defeated because you can by necessity just detect that a light pulse took longer then expected to be returned (because it was bent around the object).
- Houshalter 10y agoWell yeah, but you don't need this proof to see that. Invisibility cloaks should be detectable with Lidar I think.
- BuuQu9hu 10y agoThe paper: https://arxiv.org/abs/1702.03638 https://arxiv.org/abs/1702.03638