摘要
Before 1990s, technologies are not massive enough or fast enough in farming to warrant the relativity theory. Newton will do the trick. Now, the incredible new technology that is GPS has been made possible by a combination of scientific and engineering advances, particularly development of the world’s most accurate timepieces: atomic clocks that are precise to within a thousandth of a millionth of a second. The clocks were created by physicists seeking answers to questions about the nature of the universe, questions raised by Einstein, with no conception that their technology would some day lead to a global system of positioning and navigation.
Before 1990s, technologies are not massive enough or fast enough in farming to warrant the relativity theory. Newton will do the trick. Now, the incredible new technology that is GPS has been made possible by a combination of scientific and engineering advances, particularly development of the world's most accurate timepieces: atomic clocks that are precise to within a thousandth of a millionth of a second. The clocks were created by physicists seeking answers to questions about the nature of the universe, questions raised by Einstein, with no conception that their technology would some day lead to a global system of positioning and navigation.
出处
《农机科技推广》
2005年第3期44-45,共2页
Agriculture Machinery Technology Extension
