skells @skells@qoto.org

Holly Willoughby

Interesting fact of the day: The same effect that cuased light in a prism to split up into different colors is what ultimately caused the first transatlantic telegraphic wire in 1858 to fail.

Morse code is transmitted as on-off signals, effectively square waves. Square waves are in fact made up of many different frequencies. Like in a prism different frequencies move at different speeds through a wire. Therefore as the on-off pulses traveled through the transatlantic telegraph wire the signal spread out like it does in a prism and ultimately the pulses would overlap and be indistinguishable.

The effect was so extreme that it took a message of only 98 words (the first message sent) over 67 minutes to send one way and a whopping 16 hours to confirm the message.

Whitehouse, a doctor with little mathematical understanding, thought he could solve the problem by increasing voltage, which we now know was a futile effort. He increased the voltage to the point he managed to short out the cable entirely and made it useless. However Lord Kelvin had already warned of the problem as was ignored and he came up with the law of squares to describe the problem which later was refined to give us the telegraphers equation. The telegraphers equation is still used today to model feedlines in radio transmitters and receivers.

#Science #STEM #Physics #History @Science #QOTOJournal

boost if you're not afraid to have jesus on your tl

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I love that the internet has made it possible to learn how to properly beseige a star fortress. Better late than never.

Somehow mastodon has evolved into a place for really high quality conversations. Not sure if it's just feed-gardening or what but this place is awesome these days.

Man, I cannot believe this was almost 25 years ago...still sounds amazing.
Notorious B.I.G - The Last Freestyle (Hell on Earth Instrumentals).mp4

but did nick keep on truckin'?

> does neither
> doesnt elaborate
> takes a nap
how can one man be so based