知识贝壳
知识贝壳
所属栏目：英汉双解有机化学
Symbol:σ The reciprocal ofthe wavelength of a wave. It is the number ofwave cycles in unit distance,and is often usedin spectroscopy.The unit is the meter-1(m-1).The circular wave number(symbol:k) is givenby:k=2πσ 符号:σ 波的波长的倒数。它是在单位长度内波循环的数目,并往往 ......（本文共 253 字 ） [阅读本文] >>