How road sign reflectors work

Originally published at: https://boingboing.net/2020/08/31/how-road-sign-reflectors-work.html

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very useful for road signs we’re the only source of Illumination

Umm… where? @frauenfelder

Where the only source of Illumination is a car’s headlights, and perhaps - as importantly - one might not want the sign (or whatever) permanently illuminated, even if it could be.

They were painting lines on the streets here, and it seems reflective.

Video link for the BBS


https://www.youtube.com/watch?v=Bi_Tp1H9CDs
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On the host, his video on the color brown was fascinating. I never thought I’d find a color interesting.

He also did a pretty funny one on a toaster. It’s been one of my happy adds over COVIDSummer.

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Cats' Eyes, Retroflectors

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Thanks for spotting that typo!

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Reminds me of being in a cattle barn in the middle of the night once for a birth and looking up at one point to see all the cats on a circle. Their eyes reflecting off the torch and wondering what the fuck attracted all the feral cats to the coven just then…

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