Capsule No1 physical
What is matter made of?
The first question I will address is the matter: What is matter made of? Talk about a question, you say, matter is material, not looking for noon at two hours!
Good, let the question differently:
-What makes the table on which rests your computer?
-Of wood, you say?
And what kind of wood?
-Perfect. So we know that your table has been manufactured from material which is pine. And this pin, where is it?
-In the forest where it grew.
And how did it take to grow?
"Well, a seed has probably escaped from a pot of sprouted pine and pine near his father.
Well. Now, push further our investigation : How a tiny seed of pine could she generate the huge tree that was cut and shaped to make your computer table?
-Probably because the little pine seed has dug deep into the ground and airborne nutrients needed for growth.
-That is well said. But by what magical process, these nutrients (oxygen, calcium, iron, etc.). Could they become a tree? I can not turn my flashlight pen, is not it? Unless you're a great magician or a miracle worker like Jesus Christ, they say, could turn water into wine. So how these nutrients can they become a tree?
-This is not yesterday that the man ask these questions. Already in ancient Greek philosophers (Parmenides, Plato, Aristotle, Empedocles, Anaxagoras, etc..) Arose the question of how the rabbit eats the grass that she can become a rabbit? Democritus who is finally found the answer: all that exists is made of small particles interchangeable atoms. They are the small change of the universe. These are pieces of a huge Meccano set that can be combined in various ways to build a house now, sometimes a horse. It and the grass can turn into rabbit flesh and nutrients in the soil and air can become tree. But
atoms, which Democritus had the intuition, do they really exist? In the nineteenth century, are still not convinced. Only at the beginning of the twentieth century, particularly through the work of Jean Perrin, the reality of atoms has been proved. Thus the atom is the answer to our question: What are you made computer table and, more generally, any known matter, stars up aphids.
In the early twentieth century, the atom is seen as the ultimate reality of matter: it is indivisible and can not go further into the infinitely small. Everything would soon change profoundly.
dint of scrutinizing the atom, we find it comprises a core around which twirl and wriggle infinitely small things: electrons. And we're not out of surprises. The nucleus itself is composed of two particles: protons and neutrons. Are we finally arrived at the ultimate reality of things, the smallest particle imaginable?
is what we know in the next episode of our exciting and adventurous descent at the heart of the matter.