It MATTERS a lot!!!
We all know that
anything which has mass and occupies space is known as matter. The whole
universe is made up of matter. Matter consists of tiny particles called atoms. This atomic matter is in turn made up of interacting subatomic particles
—usually a nucleus of protons and neutrons, and a cloud of orbiting electrons.
Well, the only 4.9% of the universe
is occupied by the ordinary matter. Now what do I mean by this ordinary matter?
It is the normal matter which is composed of atoms, ions, electrons and the
objects they form. This matter
includes stars, which produce
nearly all of the light we see from galaxies, as well as interstellar gas in
the interstellar and intergalactic media, planets, and all the
objects from everyday life. But what about the rest?
There is another mysterious kind of
matter which occupies about 26.8% of the universe it is known as the dark
matter. Dark matter is a hypothetical kind of matter. It's name refers to the
fact that it does not emit or interact with the electromagnetic radiation.
Although dark matter has not been directly observed, its existence and
properties are inferred from its gravitational effects such as the motions of
visible matter. Dark matter is
transparent to electromagnetic radiation or is so dense and small that it fails to absorb or emit enough
radiation to be detectable with current imaging technology.
In particle physics we can find the
references of the word antimatter. Now what is it all about? Well antimatter is composed of antiparticles. In simple antiparticles are
the particles which are exactly same as the particles of ordinary matter
but have opposite charges. Examples
positrons e+ ( antiparticles of electrons), antiprotons.
Just like the universe keeps on
expanding the world of science too keeps on advancing. Science is organized
knowledge and it's all about imagination and curiosity to ask question.
By:-
Pranorup Mandal
