Question

WHAT IS MEAN BY DARK MATTER AND ANTI MATTER?

Answer 1

Dark matter is an undefined type of matter comprising approximately 27% of the mass and energy in the observable universe. The name refers to the fact that it does not emit or interact with electromagnetic radiation, such as light, and is thus invisible to the entire electromagnetic spectrum. It is not directly observed but it's existence and property are inferred from its gravitational effects such as the motions of visible matter, its effects in the cosmic microwave background and manyore .

Answer 2

Explanation:

Antimatter is a material composed of the antiparticle partners to the corresponding particles of ordinary matter.

For example , in Matter , a proton has positive charge while in an Antimatter, an antiproton has negative charge.