A. electroluminescence B. thermal radiation C. acoustic emission D. magnetic field interaction 相关知识点: 试题来源: 解析 A。解析:LED 灯的原理是电致发光。选项 B 热辐射不是 LED 灯的主要原理;选项 C 声发射错误;选项 D 磁场相互作用也不对。反馈 收藏 ...
Light is referred to as the range of any electromagnetic radiation of any wavelength from ultraviolet to infrared whether it is visible or not. It is...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough...
Blue light is a type of electromagnetic radiation(电磁辐射) with a very short wavelength that produces a large amount of energy. It's true that light can 1 your eyes under certain situations. But there's no scientific explanation 2 that blue light is harmful to our eyes. But many people ...
A light guide member (100) for guiding light may include a first pattern on a first side (101) of the light guide member (100), the first pattern may include a plurality of first features (110) extending along a first direction, and a plurality of second features (120) extending along...
To a physicist,lightmeans an energy that is anywhere along the electromagnetic spectrum, from ELF waves to gamma radiation. Visible light is only a narrow part of the spectrum that is most familiar to us because our eyes can detect it. In the Newtonian model of the universe everything is ...
A.rotational symmetry.B.charged particles.C.radiation flashes.D.frequent twists. 相关知识点: 试题来源: 解析 D [精解] 本题考查细节信息。文章第五段提到“Polarized light often twists as it penetrates through space as a result of its encounters with electromagnetic fields”,即当穿过太空时,经常发生旋...
a最后一片净土 Last piece of pure land[translate] a我真的希望你会过的很快乐,我很想你 I real hoped you have met very joyful, I think you very much[translate] aradiations as it is to visible light.[translate]
根据第二段第三句The human eye is sensitive to a form of electromagnetic radiation that lies in the wavelength range between 400 and 700 nanometers(纳米), commonly known as the visible light spectrum, which is the only source of color.可知,可见光是颜色的唯一来源,而可见光又属于电磁辐射,由此...
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1、什么是同步辐射光源?What is a synchrotron radiation light source? " Synchrotron radiation" refers to a continuous band of electromagnetic spectrum including infrared, visible light, ultraviolet, and X-rays. This light has been called "synchrotron radiation", since it was accidentally discovered in...