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The main source of natural light on earth is the sun The observation and study of optical phenomena such as rainbows and the aurora borealis offer many clues about the nature of light as well as much enjoyment. 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. The study of light and its interaction with matter is termed optics 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 But what exactly is light 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. Light synonyms, light pronunciation, light translation, english dictionary definition of light Electromagnetic radiation that is visible, perceivable by the normal human eye as colors between red and violet, having frequencies between.
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. Simply stated, light is nature's way of transferring energy through space Light travels very rapidly, but it does have a finite velocity.
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…
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