Flash or strobe light lets you photograph in dark places without having to increase your camera's ISO setting or use a tripod, as long as the subject is within the range of your light.

有了闪光灯，你就可以不用增加照相机的ISO刻度，或使用三脚架的情况下就可以在暗处拍照，只要拍摄物在闪光灯的有效范围里。

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Based on characteristics of optical polarizing, Malus law, and Faraday optical rotation, a long-range displacement detector is realized by same light source and double light route.

基于光的偏振特性、马吕斯定理和法拉第旋光效应，采用同光源双光路检测，实现了大量程直线位移的测量。

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XH-SBR SMD LED fluorescent light with high brightness SMD LED AS light source lamp beads , green , no flicker , long life , high color rendering index , color temperature optional wide range .

SBR贴片式系列LED日光灯采用高亮度贴片式LED灯珠为光源，绿色环保、无频闪、寿命长、显色指数高、色温可选择范围宽。

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It was equipped with a 3.5m mirror - the largest monolithic mirror ever flown - and three state-of-the-art instruments sensitive to long wavelengths of light, in the far-infrared and sub-millimetre range (55 to 672 microns).

BBC: Herschel space telescope to go blind

Also, and especially in light of the proliferation of long-range missiles, theater and national missile defenses are key.

CENTERFORSECURITYPOLICY: Summary of the Center for Security Policy's High-l