WHAT IS VIRTUAL PARTICLE ? WHAT DOES IT DO? WHAT IS ANTIMATTER & TWIN PARADOX?

In physics, avirtual particleis an explanatory conceptual entity that is found in mathematical calculations about quantum field theory. It refers to mathematical terms that have some appearance of representingparticlesinside a subatomic process such as a collision.
Antimatter is the opposite of normal matter. More specifically, the sub-atomic particles of antimatter have properties opposite those of normal matter.
the twin paradox is the apparent paradox arising from relativity theory that if one of a pair of twins makes a long journey at near the speed of light and then returns, he or she will have aged less than the twin who remains behind.

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