Particles and their antiparticles

Antiparticle were predicted before discovered

When Paul Dirac wrote down an equation obeyed by electrons he found a mirror image.

• It predicted the existence of a particle like an electron but with a opposite charge.
• The positron later turned up in a cosmic ray experiment.
• Positrons have identical mass (and energy) to electrons but they have a positive charge.

Every Particle has an Antiparticle.

• Each particle has a corresponding antiparticle.

Here are some examples of particles and their corresponding antiparticles.

Matter and Antimatter from Energy

• There is an equivalence between energy and mass.
• It all comes from Einstein's theory of relativity.
• Energy can be turned into mass,and vice versa, if you know how.
• you can work it out using E=mc² .
• When energy is…