massless particles
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Massless Particles
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-particle whose invariant mass is
zero
Massless Particle
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Known to experience the same gravitational acceleration as other particles (which provides empirical evidence for the equivalence principle) because they do have relativistic mass, which is what acts as the gravity charge
moves in straight lines in spacetime, called geodesics
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GluonGravitonNeutrinos
Photon
Kinds of Massless Particles:
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GLUON
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GLUONcarrier of the strong force
Particle that carries the force between quarks
massless bosonsmediate the strong color force between quarks
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massless tensor bosons A massless spin-2 particle which is the hypothetical quantum of the gravitational field
GRAVITON
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A hypothetical elementary particle associated with the gravitational interaction
A stable particle with zero rest mass, zero charge, and a spin of ± 2, and travels with the speed of light
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NEUTRINO
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“Ghostly Particle”An electrically neutral, very weakly
interacting particle, with a rest energy which is either zero or very small
A stable particle with no charge, a rest mass of zero, and a spin of 1/2, that carries away energy in the course of nuclear reactions
Its main characteristic is the weakness of its interactions with all other particles
NEUTRINO
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PHOTON
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carrier of electromagnetismSmallest packet of the electromagnetic force field
messenger particle of the electromagnetic force
smallest bundle of light
PHOTON
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mediate the electromagnetic force between charged particles
can also adopt a mass for a short period, in accordance with Heisenberg's uncertainty principle
A transverse wave of electric and magnetic fields which can propagate through empty space.
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GluonsGravitonsNeutrinos
Photons
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