Tag Archives: physics

Tick…Tock

“Does anybody really know what time it is? Does anybody really care (about time)?” – Chicago

What time is it? Well, no one knows for sure
As the Earth spins slower, methods of telling time diverge. Experts warn this could end in disaster
David Adam

“Working Group 7A of the International Telecommunication Union’s Study Group 7 may sound like an anonymous international committee like any other. But this is no quango of grey bureaucrats in greyer suits arguing over the desired colour of toilet paper. At the heart of this group’s discussions is something of fundamental importance to anyone who has ever taken a second to fall in love or to score a goal: time itself, and how to define it.”

Move Over Fiber Optics

Speed of light broken with basic lab kit

Electrons usually travel at about two-thirds of light speed in wires, slowed down as they bump into atoms. Hache says it may be possible to send usable electrical signals to near light speed.

Scientists have sent light signals at faster-than-light speeds over the distances of a few metres for the last two decades – but only with the aid of complicated, expensive equipment. Now physicists at Middle Tennessee State University have broken that speed limit over distances of nearly 120 metres, using off-the-shelf equipment costing just $500.