this post was submitted on 19 Jul 2023
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Showerthoughts

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A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The most popular seem to be lighthearted, clever little truths, hidden in daily life.

Here are some examples to inspire your own showerthoughts: 1

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Sign language is just radio communication but on another frequency (self.showerthoughts)
submitted 2 years ago* (last edited 2 years ago) by wipasoda to c/showerthoughts
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Because you use light to communicate in sign language, and light is just an electromagnetic wave like radio but on another frequency. You just need to be in line of sight

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[–] mykl 93 points 2 years ago (3 children)

Really, radio communication is about creating and transmitting those radio waves. Sign language relies on reflected light waves so it’s actually a form of RADAR 😀

[–] undyingarchie 35 points 2 years ago (1 children)

I’ll have what you and OP are having.

[–] [email protected] 1 points 2 years ago

what if i attach light bulbs to my hands

[–] [email protected] 12 points 2 years ago

Ok, but technically, it would actually be more like LIDAR, since we use visible light rather than radio waves

[–] [email protected] 5 points 2 years ago (2 children)

Alas, RADAR relies on transmitting and then reading the reflected waves.

[–] [email protected] 6 points 2 years ago (1 children)

RADAR: RA(dio) D(etection) A(nd) R(anging)

It doesn’t rely on self transmission. It can but you can detect and range other sources without generating it yourself.

[–] [email protected] 3 points 2 years ago (1 children)

That’s just what the acronym means, it doesn’t describes the actual process. I don’t think there is a single RADAR that doesn’t have a transmitter. At that point it would just be a… radio.

[–] Atrabiliousaurus 18 points 2 years ago (1 children)
[–] [email protected] 2 points 2 years ago (1 children)

Fair enough, though I would argue that’s a very specific subtype of radar and anyone saying “radar” refers to the type that is used in 99.999% of the cases.

[–] Atrabiliousaurus 3 points 2 years ago

Yeah probably true. I only thought to look it up because I knew active and passive sonar was a thing.