我与小娜（18）：购买LIGO“绝活儿“，值不值？

我与小娜（18）：购买LIGO“绝活儿“，值不值？

      我与小娜认为，国人对LIGO的绝活儿（激光干涉仪）的测量精度认识不足，舍不得花钱去买这套“绝活儿”。

      小娜提醒，2月17日，印度政府决定在国内建设一套第二代LIGO，投入1.85亿美元。值不值呢？

      小娜提醒，在“LIGO-India Gets Green Light”一文中，描述了LIGO的”绝活儿“：“A change in thelengths of the arms smaller than one-ten-thousandth the diameter of a proton(10^-19 meter) can be detected.”也就是说，“to being able to measure the distance between our solar system and theSun's nearest neighbor Alpha Centauri -- about 4.4 light-years away --accurately to within a few microns(微米), a tiny fraction of the diameter of a human hair.”

      印度花钱能不能真的买到这套“绝活儿”？请看LIGO负责人的表态："We havebuilt an exact copy of that instrument that can be used in the LIGO-IndiaObservatory," says David Shoemaker, .the leader of LIGO，"ensuring that the new detector can bothquickly come up to speed and match the U.S. detector performanceanced “

同时，LIGO还负责对印度方面的技术人员的培训。这等于把LIGO的“绝活儿“全部转移给了印度，带动了整个印度高技术产业的发展，……印度花小钱办大事。我们呢？不要花大钱，买”玄乎“！

袁萌    2月22日