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neopolitan
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Mentz114 said:Are you saying there is no limit below which we cannot detect light ? That's just plain wrong. Our instruments are not infinitly sensitive. Already we have to cool the detectors to very low temperatures.
It was largely irrelevant to the thread where it originally appeared, but I think it is also largely wrong. I am pretty damn sure that we can detect all frequencies below the light spectrum at least down to the ELF radio spectrum - we might have problems with weak signals but not lowish frequencies. Admittedly you need a landmass as the detector (like a peninsular or a subcontinent), but it is technically feasible to detect an ELF signal.
Problems with detecting frequencies below ELF (below 1 hertz for example) would have nothing to do with the temperature of the detectors and more to do with the size of the detectors.
Is this wrong?
I don't think there is any transmitter in the universe that is moving fast enough to cause doppler shift down to below ELF, is there?
cheers,
neopolitan
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