Wednesday, April 22, 2015

What Is Light

Light: An Electromagnetic Wave

Light is an different type of energy that traavels as a wave. But also light is an different other kind of waves. There are different kinds of waves such as Sound Waves and Water waves. an that it must travel throught matter. An that light does not matter require matter through which to travel. Also light is an electromagentic wave.

Electromagentic wave is a wave that can travel through empty spaces or matter and consists of changing eletric and magnetic field. Light is part of the electromagnetic spectrum, which ranges from radio waves to gamma rays. Electromagnetic radiation waves, as their names suggest are fluctuations of electric and magnetic fields, which can transport energy from one location to another. Visible light is not inherently different from the other parts of the electromagnetic spectrum with the exception that the human eye can detect visible waves. Electromagnetic radiation can also be described in terms of a stream of photons which are massless particles each travelling with wavelike properties at the speed of light. A photon is the smallest quantity of energy which can be transported and it was the realization that light.

Matter is composed of atoms, ions or molecules and it is light’s interaction with matter which gives rise to the various phenomena which can help us understand the nature of matter. The atoms, ions or molecules have defined energy levels usually associated with energy levels that electrons in the matter can hold. Light can be generated by the matter or a photon of light can interact with the energy levels in a number of ways.

Fields exsit around certain objects and can exert force on another object without touching that object. For example, Earth suface of a gavitational field. A field pulls you and all things toward earth. But keep in mind that this field are like all fields is not made out of matter. 

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