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The main source of natural light on earth is the sun Historically, another important source of light for humans has been fire, from ancient campfires to modern kerosene lamps With the development of electric lights and power systems, electric lighting has effectively replaced firelight. Light is electromagnetic radiation that can be detected by the human eye Electromagnetic radiation occurs over an extremely wide range of wavelengths, from gamma rays with wavelengths less than about 1 × 10 −11 metres to radio waves measured in metres. Science and applications is an open access journal that publishes the highest quality articles in basic and applied optics and photonics.
How to use light in a sentence The brightness that comes from the sun, fire, etc And from electrical devices, and that allows… Light is a transverse, electromagnetic wave that can be seen by the typical human The wave nature of light was first illustrated through experiments on diffraction and interference. In order to see, there must be light
Light shines on an object, then bounces off, or reflects, back to our eyes Our eyes are sensitive to a certain kind of light called visible light Visible light is all the colors (red, yellow, blue, etc.) that we can see But there are many other kinds… But what exactly is light Is light a wave or a particle
Introduction light, visible electromagnetic radiation Of the entire electromagnetic spectrum, the human eye is sensitive to only a tiny part, the part that is called light The wavelengths of visible light range from about 350 or 400 nm to about 750 or 800 nm The term “light” is often extended to adjacent wavelength ranges that the eye cannot detect—to infrared radiation, which has a.
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