Historically, another important source of light for humans has been fire, from ancient campfires to modern kerosene lamps The study of light and its interaction with matter is termed optics With the development of electric lights and power systems, electric lighting has effectively replaced firelight.
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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.
The meaning of light is something that makes vision possible How to use light in a sentence Light is a type of energy that enables us to see with our eyes Light travels from a source, like the sun or a light bulb, to our eyes, and to the surroundings
That is the reason we can see objects during daytime with the sunlight, or with a light bulb in the night. In his formulation of electromagnetism, maxwell described light as a propagating wave of electric and magnetic fields More generally, he predicted the existence of electromagnetic radiation Coupled electric and magnetic fields traveling as waves at a speed equal to the known speed of light.
When light hits a transparent object, it passes through it almost completely without making a significant shadow
Light is a form of electromagnetic radiation that shows properties of both waves and particles. Its carrier particle is the photon Light is the basis for the sense of sight and for the perception of colour Nasa's nighttime lights imagery has a wide range of uses, including tracking urban growth, assessing electrification, monitoring disasters, and studying the biological impacts of light pollution.
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.
