The First Fi Rocked Cables

Fibre optics were the novelty item before they were use to transmit information. Back in the cold war days, we would spy on each other by going down to these cables in ocean that i litter,. They'd cut it open the sheath and capture what's called the evanescent wave. So inside your fibre optic the light's bouncing as it passes from one end to the other. As it bounces along the edge, there's a property called evanescence of waves where it actually leaves the terial ever so slightly. And so as it leaves the glass fibre just a little bit, you can detect its signal as it leaves. But anyway, sir wat ser i, i