🌍 Have you ever wondered what the foundations of our reality are based on?
What if I told you that the world around us is governed by mysterious particles and invisible dimensions?
Would you believe me?
Nothing could be further from the truth...
Yet the nature of the forces and elements that shape our universe is unknown to us.
Admittedly, scientific advances over the last few centuries have enabled us to understand in detail the events that unfold on a macroscopic scale.
But when we venture onto smaller scales, it's as if we're entering a parallel reality whose workings escape us.
In this world of the infinitely small, the laws of physics and relativity we know no longer apply.
Instead, we find strange, sometimes invisible particles interacting in ways so mysterious that we find it hard to believe how they work.
Quantum physics, string theory, supersymmetry, the uncertainty principle...
So much vocabulary that attempts to describe the mechanisms of this invisible reality to make it easier to understand.
🔥 As a reminder, videos are published on SUNDAYS at 6pm.
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💥Voyage vers l'Infiniment Petit:
- Each discovery inevitably raises its own set of questions...
In their quest to probe the microscopic world, scientists have nonetheless been able to venture deep into nature's smallest secrets.
While a few decades ago we thought that atoms were the inseparable building blocks of matter, today we know that these elements are home to an incredible bestiary of particles.
Quarks, gluons, Higgs bosons, neutrinos, photons...
It's enough to make you dizzy!
To say that these elements are minuscule is an understatement.
To understand this, let's compare scales.
Observations of the cosmos tell us that the diameter of the observable universe is around 93 billion light-years.
This universe would include between 100 and 200 billion galaxies.
In fact, our Milky Way is but a tiny drop of water in a cosmic ocean.
Yet, from our perspective, its dimensions are inordinate: almost 53,000 light-years.
That's enough to house between 200 and 400 billion stars, and probably more than 100 billion planets...
Among these stars is our sun: nearly 700,000 km in radius.
That's around 109 times the diameter of the Earth.
Our beautiful blue planet, gigantic to our eyes, is in reality invisible to those of the cosmos.
For if the solar system were a city twenty kilometers across, the Earth would be little more than a grape.
And yet, nearly 8 billion human beings live on it.
But then again, appearances are deceptive, as man is far from occupying all the space available on Earth.
If we were to group together all the human beings currently living, they would fit on an area equivalent to the city of Los Angeles...
So, compared to a modestly-sized terrestrial planet, man is a grain of sand.
If this scale comparison gives you a slight headache, just wait for the next part.
Because it's possible to go much further.
Each human being, however microscopic compared to the cosmos, is made up of around 30,000 billion cells.
And these tiny cells, observable only under the microscope, are themselves made up of 100,000 billion atoms!
This figure varies greatly from cell to cell, but it's still completely excessive.
Wait, we can go even further...
If you look at the core of atoms, you'll be amazed to discover that they're 99.9%... empty!
In other words, matter is theoretically made up of nothingness!
It may sound crazy, but hidden in this nothingness are tiny elements of the quantum world that give life to the reality we know.
And although we are made of atoms, their profound nature seems even more distant than the confines of the observable universe.
So, the infinitely small conceals many mysteries.
So get ready to travel to the heart of matter!
Together, we'll try to unlock its secrets by literally looking deep inside ourselves...
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🎬 Today's program:
00:00 - Introduction
06:11 - The macroscopic world
21:27 - Diving into the heart of atoms
35:44 - Subatomic particles
39:45 - Quarks
48:46 - Leptons
50:55 - Bosons
55:25 - The Standard Model
1:03:51 - Higgs boson
1:08:45 - The mysteries of quantum physics
1:18:20 - String theory
1:23:38 - Supersymmetry
1:26:26 - Quantum loop theory
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9 июл 2024
