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. Discover our free virtual online flashlight and turn any device into a virtual light or flickering disco strobe The meaning of light is something that makes vision possible
How to use light in a sentence 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 most situations, light behaves like a wave with properties like wavelength and frequency, and is subject to diffraction and interference In some situations, light can be considered to behave like a particle called a photon This particle has no mass, but carries a fixed amount of energy.
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… Is light a wave or a particle
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