Light energy travels in the form of a wave as it travels. However, no matter is, essential to carry the light energy to travel. This is why the light energy can travel through space where there is no air, whereas it is not the same with sound waves, as they have to travel through ...
光是什么? Light is a kind of energy you can see. You can seelight from the sun. You can see light from a candle or from a light bulb. Light moves in a straight line. It cannot move around things that get in its way. When something gets in the way of light, it makes a shadow...
luminous energy is the perceived energy of light. It can also be defined as the electromagnetic radiation of visible light. Since light itself is energy, then another definition is relevant: light is nature’s
A. Light Emitting Diode B. Light Emitting Device C. Light Energy Diode D. Light E. nergy Device 相关知识点: 试题来源: 解析 A。“LED”是“Light Emitting Diode”的缩写,意思是发光二极管。选项 B“Light Emitting Device”是发光设备;选项 C“Light Energy Diode”是光能二极管;选项 D“Light Energy...
“LED is energy-efficient.” What does “LED” stand for? A. Light Emitting Diode B. Light Emitting Device C. Lighting Emitting Diode D. Lighting E. mitting Device 相关知识点: 试题来源: 解析 A。“LED”代表“Light Emitting Diode”,发光二极管。选项 B、C、D 的说法错误。
“Beingdepressedcanleaveyoufeelinglowinenergy,whichmightputyouoffbeingmore active.Regularexercisecanboostyourmoodifyouhavedepression,andit?sespeciallyusefulfor peoplewithmildtomoderate(中等的)depression,”itwroteonitswebsite. Itseemslikenothingcanbeatthatfeelingwegetafteragoodworkout,evenifwedon?tfully understan...
百度试题 结果1 题目is well known, light, like heat, is a form of energy. A. It B. What C. Just as D. As 相关知识点: 试题来源: 解析 B 反馈 收藏
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 ...
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devicesweareexposingourselvestobluelight. Bluelightisatypeofelectromagnetic(电磁 的)radiationwithaveryshortwavelengththat producesahighamountofenergy.Whileit?strue thatlightcandamageoureyesundercertaincircumstances,there?snoscientificevidencesuggestingthatbluelightisharmfultooureyes.But manypeoplestillthinkitis,whichis...