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Light is not made out of atoms or anything like them. Electromagnetic waves are themselves a basic ingredient of our world. It's the light itself which enters our eyes. It is absorbed by special molecules which change their chemical configuration as a result of that absorbed energy.
Atoms emit and absorb light at characteristic energies. This produces "emission lines" in the spectrum of each atom.
How is light created at the atomic level? Atoms are composed of nuclei, agglomerates of protons and neutrons, which have electrons in orbitals around them; as many electrons as protons so that normally atoms are neutral.
19 hours ago · Atoms contain electrons in fixed energy levels. Shining light on them is therefore expected to give the electrons energy and enable them to escape from the atom, with brighter light liberating ...
Light is actually energy made of small particles called photons. To get a better idea about how atoms create light, play Light Quest! Where do photons come from? To understand where photons come from, let's take a closer look at the atom: In the center of every atom is a tiny, dense nucleus.
Summary. Light and other forms of electromagnetic radiation move through a vacuum with a constant speed, c, of 2.998 × 10 8 m s −1. This radiation shows wavelike behavior, which can be characterized by a frequency, ν, and a wavelength, λ, such that c = λν. Light is an example of a travelling wave.
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Mar 22, 2023 · Electronic sources. Light-emitting diodes (LED) emit light because electrons transition between different energy levels within a semiconductor. These transitions are similar to atomic transmissions, but the energy in the light emitted can be controlled by varying the material of the semiconductor.
