<P> The photon is a type of elementary particle , the quantum of the electromagnetic field including electromagnetic radiation such as light , and the force carrier for the electromagnetic force ( even when static via virtual particles ) . The photon has zero rest mass and always moves at the speed of light within a vacuum . </P>
<P> The photon is a type of elementary particle , the quantum of the electromagnetic field including electromagnetic radiation such as light , and the force carrier for the electromagnetic force ( even when static via virtual particles ) . The photon has zero rest mass and always moves at the speed of light within a vacuum . </P>
what are the basic defining characteristics of a photon
what are the basic defining characteristics of a photon
zero rest mass always moves at the speed of light within a vacuum
zero rest mass always moves at the speed of light within a vacuum