Originally published at: https://boingboing.net/2019/07/05/video-ding-dong-whos-there.html
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There’s a snake on my stoop!
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Not a very smol snek.
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Maybe the snake detected the infrared illuminating LED in the camera and decided to see if it was a small mammal or bird.
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A snake ringing the doorbell who?
(sfx: crickets)
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But snek has learned its manners well; to slither up and ring the bell. So there’s that.
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Sometimes having cameras everywhere makes me think
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In other news, Apple anounces a magical new direct sales program. “We call it, ‘Eden.’”
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Ding dong!
Who is it?
Is snek!
Fun!
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Probably not. Infrared (and also UV) covers a very wide of frequencies, with fairly different properties. IR illumination LEDs typically use 850 or 940nm light, which is just a little bit on the other side of the visible spectrum (400-700nm) and behaves a lot like visible light. IR radiated as heat, in the temperature range which is detected by thermal imagers, is typically longer than 10 microns (10,000nm).
To put the difference in perspective, the peak frequency for heat radiation from a mammal is about 9400nm. To radiate incandescent light with a peak at the frequency of an IR illumination LED would require a temperature of ~3100C, so that’s probably not what a snake is detecting with it’s temperature sensors.
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