Sir Peter Knight: World Metrology Day #metrology #WorldMetrologyDay #quantumphysics

追加: 2026-05-23

[00:00:00]This is a lab which is looking at the way in which we could build a new atomic clock running at optical frequencies.

[00:00:10]This is NPL. NPL is the birthplace of atomic time. The way that we define the second is because of atomic clocks that were invented here. And they're all radio frequency clocks, but if you can step up the frequency into the optical region, the precision becomes phenomenal.