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This phenomenon is called phosphorescence.
No. The more energy the accelerator can give the particle, the closer the particle can approach to the speed of light, but it can never reach exactly that speed.
Light doesn't really feature in chemistry but on the rare occasions it does it is as a wave and a form of energy, not a particle.
A photon, or particle of light, is released.
The photoelectric effect is a quantum electronic phenomenon in which electrons are emitted from matter after the absorption of energy from electromagnetic radiation such as x-rays or visible light.
It is called a Photon.
Light consists of particles called photons.
Light comes in chunks of energy called photons.
The particle model of light entails that light consists of tiny packages of energy called photons. Because light is an electromagnetic wave the model is a part of the general model for electromagnetism. This model is called Quantum Electrodynamics, or QED in short.
This phenomenon is called phosphorescence.
light
Photons
A photon.
Photon
A particle of light. Or, in general, of an electromagnetic wave.
The smallest particle or packet of light energy you can get.
photon