An arc of all seven spectral colors appearing in the sky opposite the sun as a result of the refractivedispersion of sunlight in drops of rain or mist.
由于雨滴或雾滴对阳光有折射分光作用，使空中太阳对面出现的一道有七色光谱的弧。
2
Optical glass with high refractive index and high dispersion are used more and more as optical design trend to miniaturization and digital.
高折射率高色散光学玻璃在目前小型化和数字化的光学设计中的用途越来越广。
3
Refractive index, chromatic dispersion and absorption coefficient are material figures of merit for ultrafast all optical switch.