Massless Particles

-particle whose invariant mass is

zero

Massless Particle

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

GluonGravitonNeutrinos

Photon

Kinds of Massless Particles:

GLUON

GLUONcarrier of the strong force

Particle that carries the force between quarks

massless bosonsmediate the strong color force between quarks

massless tensor bosons A massless spin-2 particle which is the hypothetical quantum of the gravitational field

GRAVITON

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

NEUTRINO

“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

PHOTON

carrier of electromagnetismSmallest packet of the electromagnetic force field

messenger particle of the electromagnetic force

smallest bundle of light

PHOTON

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.

GluonsGravitonsNeutrinos

Photons

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