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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. What is light in physics 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. 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 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. Is light a wave or a particle And why can’t humans see the whole spectrum of 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. The study of light and its interaction with matter is termed optics 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. Something that makes things visible or affords illumination. See examples of light used in a sentence. 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.