I finally get my hands on what I consider a holy instrument: the HP 5061A Cesium clock. We'll turn it on and play with it, of course, but I'll also explain how it works in more details than most videos, both the quantum physics principle and the HP implementation. What makes it tick is just mind blowing. See continuation in part 2 here: https://www.youtube.com/watch?v=xTy1kY_wtsY Cody's Lab Cesium video: https://www.youtube.com/watch?v=rSJGwnERIVU Our sponsor for PCBs: https://www.pcbway.com/ Support the team on Patreon: https://www.patreon.com/curiousmarc Buy shirts on Teespring: https://teespring.com/stores/curiousmarcs-store Learn more on companion site: https://www.curiousmarc.com/ Contact info: null Music Credits: Crinoline Dreams by Kevin MacLeod (www.incompetech.com) Scott Joplin's Nonpareil Rag by Scott Kirby (http://scottkirby.net/)