Incandescents are also incredibly inefficient, using only 10 percent of their consumed electricity to emit light.

白炽灯泡的效率也是令人难以置信的低，只利用其电力消耗的10%来发光。

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In the next long period of time, the sun brother have tried my best to emit light, but he did not hear the sound of children's reputation.

在接下来的好长一段时间里，太阳哥哥都用尽全力发射阳光，可是他却没有听到小朋友的称誉声了。

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A quantum-dot display would work by arranging quantum dots that emit red, green and blue light in a grid-like pattern, and getting those dots to emit light directly.

量子点显示技术的工作原理是，通过将散发红光、绿光与蓝光的量子点排列为网状图案，并让这些量子点直接发光。

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So, if you use a black lamp or something and you excite something up to a higher energy level and then it relaxes back down to its lower energy state, it's going to emit a new wavelength of light, which is going to be visible to you.

如果你用一个紫外灯或别的,东西把某种分子激发到,更高的能级，然后它会掉回,到低能级，它就会释放,一个新的波长的光,这个光是可见的。

麻省理工公开课 - 化学原理课程节选

Even something too small to emit visible light will probably give off radio waves and infra-red radiation (Jupiter does).

ECONOMIST: X marks the spot

These can be made to emit white light by coating the device with a phosphor compound that absorbs part of the blue light and re-emits it as yellow.

ECONOMIST: Lighting: A brilliant new approach | The

But LEDs are made from a semiconductor material, and are able to emit much more light for the same amount of electricity.

BBC: LED light bulb to last more than 20 years