Benny:
I like watching football <a href=" http://oldbarnrescue.com/lithium-carbonate-eskalith-cr.pdf ">lithium eskalith classification</a> Researchers built these atomic clocks by trapping thousands of ytterbium atoms at high density. Each ytterbium clock depends on about 10,000 rare-earth atoms cooled to 10 microkelvin, or 10 millionths of a degree above absolute zero. The atoms are trapped in in optical lattice made of laser light. Another laser that 芒聙聹ticks芒聙聺 at a the incredible rate of 518 trillion times per second instigates a transition between two energy levels in the atoms. The massive number of atoms is the key to the clocks stability, researchers explained.
    Benny写于2016/4/3 3:10:29