Based on the accurate expression of light intensity at transverse plane, the propagation characteristics of monochromatic planar wave diffracted by small circular aperture are analyzed in this paper.
采用横截面上光强的精确表述，分析了单色平面波微小圆孔衍射后，其衍射光束的传输特性。
Because of the pretty appearance, high intensity, elimination of heat, light weight and small inertia resistance, the A-alloy hub replaced the steel hub became the labeling of high-grade automobile.
铝合金轮毂以其优美的外观、高的强度、良好的散热性、相对轻的质量、较小的惯性阻力等，已经逐渐代替钢制轮毂，成为高品位汽车的标志。
At low ambient temperature or small discharge current, the local light intensity emitted by fluorescent lamps may show fluctuations called striations, which seriously disturb the illuminations.
在环境温度较低或放电电流较小时，荧光灯的发光正柱有可能出现光强的扰动和明暗相间的条纹，称为条纹放电，它会对照明产生干扰。
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