... As The Light Changes 随着光线变化 Such As Blue Light 如兰灯 But As Radiant Light 而发散光芒 ...
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Red aurora are generated by light emitted at a longer wavelength (0.630 micrometers), and other colors such as blue and purple are also sometimes observed.
红色的极光是由较长波长(0.630微米)的发出光引起的，有时也会观察到其他诸如蓝色和紫色的极光。
Under UV light, clean sand appears purple or black. Some minerals, such as calcium carbonate in seashells, glow blue, as does a shovel handle in the picture above.
紫外线照射下，干净的沙子呈紫色或黑色。有些矿物，如海贝中的碳酸钙，会闪着蓝光，就如同上图中的铁锹的把手。
They exposed the creatures to a beam of directed blue light, as might come from certain bioluminescent predators, as well as to other stimuli such as passing shadows.
他们揭露了生物的蓝色光束，可能来源于某个会发光的食肉动物也可能是受到其他的刺激，如通过的阴影。
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