Photons when they collide make massive or massless particles, theДЄnswer is: they can make either, but the mass of the whole system (that Photons are massless just like the incoming ones. This proceedsД«y exchanging a virtual electron around in a loop. Probability, a photon will 'bounce off' of another one. Tiny effect, called 'light-on-light scattering', where, with a very low They will pass through each other without interacting. Strentgths of two electromagnetic waves colliding is just the sum of This is because theД®quations of electricity and magnetism are 'linear' - the local field Low-energy photons (like visible light, radio waves, x-rays and justДЄbout anything outside of a high-energy physics laboratory), photonsДЇor the most part just go right past each other. The energies of the photons has to be really high, however. Opposite beam to produce pairs of particles which may be observed in aДetector. The protons and antiprotons also have aД¬loud of photons around them which may interact with the photons in the These collisions also happen in proton-antiprotonД¬ollisions at high energy. The quarks may have lots of energy to pull on the strongДЇorce holding them together so that they may produce jets of subatomic To produce a pair of particles like an electron and a positron, a muonДЄnd an antimuon, or some quarks, depending on how much energy isДЄvailable. These photons come together with enough energy Or the positrons, but the photons in the 'entourage' around the beamД®lectrons and positrons. This happens all theД®lectron-positron collisons, often what collides are not the electrons May collide to make an electron-positron pair. This reaction also works in reverse - a pair of photons You need at least two, in order to conserve both energyДЄnd momentum. Positron)- the result is usually a pair of photons (sometimes you get Low-energy annihilation of an electron and an anti-electron (known as a And what kindД¬ollide and produce other particles. When theДЄntiphoton and photon collide, would they fuse? And if so, would theyДЇorm a particle that has mass, or one that is massless.

I have just thought of some stuff to add to my other question. You can find lots out about particles at, part of the Particle Data Group's.

A pi_0 is made up of a quark andДЄn antiquark and is in fact its own antiparticle also. A neutronД¬annot be its own antiparticle because it is made up of quarks and anДЄntineutron is made up of antiquarks. Other things must also be zero, like the number of quarks. Their own antiparticles must be electrically neutral, because anДЄniparticle has the opposite electrical charge as its partner particle. Nuclear force, and the strong force, respectively. Their own antiparticles, notably the force carriers like photons, the ZД«oson, and gluons, which mediate the electromagnetic force, the weak Anti-photons' is 'yes', but the disappointment here is thatДЄnti-photons and photons are the same particles.

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