高二生物实验,有四个实验要用到生物显微镜。作为一名生物实验员,除了能正确使用生物显微镜外,其中的一些常见数字也应了解清楚,这对于提高自己使用显微镜的能力会有帮助。1 物镜上的主要参数物镜上通常标有“40/0.65”,“160/0.17”等主要参数,其中“40”表示放大倍数,“0.65”表示数值孔径(numerical aperture,简写为N.A),“1601/0.17”分别表示镜筒长度 In the second year of biological experiment, there are four experiments to use biological microscope. As a biological experimenter, in addition to the correct use of biological microscopes, some of the common figures should be clearly understood, which will help improve your ability to use the microscope. 1 The main parameters on the objective lens are usually marked with “40/0.65”, “160/0.17” and other main parameters, where “40” indicates the magnification, “0.65” indicates the numerical aperture (NA), “ 1601/0.17” indicates barrel length