Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is the visible spectrum that is visible to the human eye and is responsible for the sense of sight.
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Light exhibits the following properties and phenomena
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+ Wave or stream of particles
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In some of the experiments light exhibits properties that prove the wave nature of light. Whereas in some other experiments, the observations reveal that light is a stream of particles travelling from one place to another. But now scientists have explained that because of its dual nature light can be considered as particle in some cases and as a wave in some other cases
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+ Characteristics of wave nature of light
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Wavelength -distance between two consecutive crests/troughs ,Frequency -number of waves passing through a point per second ,Interference -overlapping of two or more light waves ,Diffraction -spreading of light waves when it passes though the corners of an object
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Diffusion in liquids is slower than in gases because the particles in a liquid move more slowly.
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+ Other Phenomena
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Reflection -bouncing off of light from an object ,Refraction -bending of a wave on change of medium ,Scattering -redirection of light in many different directions when it interacts with matter ,Polarization -When the electric field vectors are restricted to a single plane by filtration, then the light is said to be polarized with respect to the direction of propagation