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. The meaning of light is something that makes vision possible
How to use light in a sentence Some states in the northern parts of the contiguous u.s Have a chance of seeing the northern lights on wednesday, nov 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.
12, one day after the aurora borealis lit up skies across the u.s. But what exactly is light Light is just one form of electromagnetic radiation, or electromagnetic waves These waves are all around us and come in many sizes The largest electromagnetic waves, with wavelengths from a few centimeters to over 100 meters are called radio waves. 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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