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Re:I amplified my home's Wi-Fi with aluminum foil by throwaway613834 on Wednesday December 27, 2017 @05:45AM (#16014030)
I was assuming geometric optics... because it was simple enough to get the point across. Which of course you knew, but took the liberty to 'correct' anyway. It's quite impressive how you can always count on HN pedants to deliberately go out of their way to technically-correct you while making sure to completely miss the actual point you're trying to make.
Re:I amplified my home's Wi-Fi with aluminum foil by pjc50 on Wednesday December 27, 2017 @06:07AM (#16014103)
You're the one that started in by trying to wrongly "correct" the statement "every improvement in sending is completely equivalent in receiving for a system that uses the same antennas for both directions of communication" (which is actually correct).

The fact that you can't have perfectly collimated beams and must make do with antenna pattern "lobes" is actually important here.