> If anyone is wondering: yes, you can own your very own atomic clock for a "reasonable" price! Just to clarify, the clocks used to demonstrate gravitational t

> If anyone is wondering: yes, you can own your very own atomic clock for a "reasonable" price! Just to clarify, the clocks used to demonstrate gravitational time dilation were on the order of $10,000 (or more, e.g., [0]). But one can find rubidium standards online for a few hundred dollars. [0] http://www.ebay.com/itm/HP-5061B-Cesium-Beam-Frequency-Standard-Fully-Tested-and-Guaranteed-Working-/321564435988 http://www.ebay.com/itm/HP-5061B-Cesium-Beam-Frequency-Stand...