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Annowhat t1_itzncdi wrote

Reply to comment by FTMHorn in Every language travels at the speed of sound, except sign language that travels at the speed of light by _somename_

Those would be slower than light I think, they would still be very fast, but not as fast as light.

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NuclearCreations t1_itzuxwm wrote

They are electromagnetic waves, they travel at the speed of light.

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Logicrazy12 t1_itzxs4y wrote

The waves sure but the devices don't.

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JAM3SBND t1_iu001ej wrote

Not to mention a visual distance is shorter than electronic distance.

Me to you
Vs
My fingers to phone to satellite to your phone to your eyes

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Logicrazy12 t1_iu00c9z wrote

It also take time to compress, decompress, and convert the files being sent to each device.

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Muroid t1_itzzcye wrote

Electricity travels through wires at a high percentage of the speed of light, but not at the speed of light.

Same applies to light in fiber optic cables, actually.

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OpenGiraffe t1_iu00sq9 wrote

The light in fiber optic cables travel at the speed of light, don't they?

Only, not the characteristic speed of light in vacuum, c≈300 000 km/s. You have to take the refractive index into account. But it's still the speed of light, through that specific medium (fiber optic cable in this case).

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Muroid t1_iu01r1h wrote

The speed of light almost always refers to c. It would technically be correct to refer to any speed that light travels at as “the speed of light” but given the common name of c, that is almost never what people mean or understand by the phrase “speed of light” unless it’s been very clearly specified.

The speed of light through air is very, very close to c. The speed of light through fiber optics isn’t. Still a high percentage of c so very fast, but not a value that you’d ever mistake for c. With air it’s practically a rounding error away.

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primeprover t1_itzvlhy wrote

There will be some latency, but then they will travel at a very similar speed to the speed of light. That said the latency could be longer than the travel time. I remember reading a story once where someone had an issue sending emails further than 500 miles. Turns out there was a very fast timeout that was long enough for light to travel around 500 miles. Found it: https://www.reddit.com/r/sysadmin/comments/a6ay6j/the_case_of_the_500mile_email/

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