[화학]Bose Einstein의 응축현상에 대한 리포트
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Bose Einstein의 응축현상(condensation)에 대한 영문 리포트
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Before Bose-Einstein condensation appear (BEC), it was believed that there were 4 types of states that substances can have : solid, liquid, gas, and plasma. However, there is 5th substance, BEC. It had been developing from Bose-static. He couldnt explain well about his theory and didnt get approval of contemporary scientists. Therefore, he sent to Einstein a mail about his theory, and Einstein studied about that and improved more. He applied Boses theory to atoms to know how atoms would behave in a gas. He made hypothesis that when Bose atoms are cooled near absolute zero, atoms would have lowest energy degree and get together at the bottom. To understand this, we should consider what temperature is. Temperature is made by random movement of atoms. When atoms inside a object move fast, our body interpret this hot. Contrarily, when atoms inside the object move slowly, our body interpret this cold. If object is solid, movement is vibration, and if object is gas, movement is flying around. There is a kelvin-temperature system which measure heat from the absolute zero which is the theoretically possible temperature a substance can get as a lowest degree. We can deduce that by disturbing their movement, we can get lower energy, because temperature is related with movement of atoms. It took about 70 years to realize Einsteins concept, because it was not easy to get low degree temperature near absolute zero.
참고 자료
http://www.colorado.edu/physics/2000/bec/what_its_good_for.html
http://blog.naver.com/ssemi81?Redirect=Log&logNo=100003572355