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 ...
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 ...
Blue light is a type of electromagnetic radiation(电磁辐射) with a very short wavelength that produces a high amount of energy. While it's true that light can damage your eyes under certain conditions, there's no scientific evidence suggesting that blue light is harmful to our eyes. But many...
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...
theres an angler fish theres an notion in m theres an old man sit theres another world theres just a shadow theres just so many t theres just so much t theres love that cann theres no light at th theres no need to mak theres no one here bu theres no reason theres no time for us...
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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 ...
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...
would produce a photocurrent in the metal, whereas longer wavelength (red) light—even at high intensity—would not produce a photocurrent. This curious observation strongly supported the quantum theory of radiation. Some German physicists theorized that a single photon (particle of light) has a ...
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...