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- Matter is composed of atoms, ions or molecules and it is through their interactions with light 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.
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Nov 14, 2024 · 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 metres to radio waves measured in metres.
Dec 7, 2022 · Light has the properties of waves. Like ocean waves, light waves have crests and troughs. The distance between one crest and the next, which is the same as the distance between one trough and the next, is called the wavelength .
In this chapter, we study the basic properties of light. In the next few chapters, we investigate the behavior of light when it interacts with optical devices such as mirrors, lenses, and apertures.
The primary properties of light are intensity, propagation direction, frequency or wavelength spectrum, and polarization. Its speed in vacuum , 299 792 458 m/s , is one of the fundamental constants of nature. [ 6 ]
Does light travel as a wave, a ray or a stream of particles? Is it a single color or many colors mixed together? Does it have a frequency like sound? And what are some of the common properties of light, such as absorption, reflection, refraction and diffraction? You might think scientists know all the answers, but light continues to surprise them.
Dec 28, 2020 · Science. Physics. Light (Physics): What Is It & How Does It Work? By GAYLE TOWELL Updated Aug 30, 2022. Understanding the particle-wave duality of electromagnetic radiation (light) is fundamental to understanding quantum theory and other phenomena as well as the nature of light.
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In the mid-19th century, light was described by James Clerk Maxwell in terms of electromagnetic waves, but 20th-century physicists showed that it exhibits properties of particles as well; its carrier particle is the photon. Light is the basis for the sense of sight and for the perception of colour. See also optics; wave-particle duality.
