What Holds the Universe Together? The Fundamental Forces

The universe is a wondrous place, but what makes it all tick. What holds it all together and stops everything from just flying off into… well space. In this video I’m going to have a beginners guide look at the fundamental forces that hold the universe together. Let’s find out more.

There are a number of fundamental forces, or interactions as they tend to be called, and I’m going to take each of them in turn and explain what they do. They are called fundamental because they can’t be resolved into other simpler interactions. For instance the force of friction, can be explained by using another force called electromagnetism, electromagnetism however, can’t be explained using any simpler force, and so electromagnetism is one of our fundamental interactions, but more about that later. The interactions that I’m going to look at today are electromagnetism, that I’ve already mentioned, the strong interaction, which is sometimes also called the strong force or the strong nuclear force. The weak interaction or the weak force or the weak nuclear force, and gravity, but gravity is a bit strange so I’ll leave that till the end.

My Vacuum Decay video

Ask a Physicist Anything by Joe McCullough

Stable elements graph

Chapters
0:00 Introduction & Explanation of what will be covered
1:20 The Strong Interaction
4:10 Particles Involved
5:30 The Weak Interaction
8:45 Beta Minus Decay
11:20 Beta Plus Decay
12:55 Electromagnetism
13:45 Virtual Particles
14:45 Why do like charges repel?
15:50 Why do opposite charges attract
17:10 The Electroweak Force
18:10 Gravity
20:40 Gravity and acceleration

[ReVoxa]

This is the first time I've actually heard a decent explanation of what the weak force is!

[QuantumDynamics]

17:00 one explanation could be that the virtual particle waves are oriented in the opposite way (up or down) thus when they make contact they cancel each other out, preventing them from being reabsorbed. This causes a surplus of virtual particles on the opposite sides, propelling the real particles toward each other.

[scottwilson]

This Episode has given me some insight regarding the weak nuclear force. I have had at least a layman's understanding of the other 3 forces for a long time. It is great to at last grasp this. I really like this channel.

[joz]

Welcome back you have been missed and so has the channel.

[jonathandaflon]

Omg I just got back to the channel after a while and saw the video. Then I thought "wow he made the video" just to see my name on the screen. You made me really happy sir ❤

[ReflectiveLayerFilm]

Awesome video. Good to see that you're still making . For some reason I missed the past few videos. This channel starting to grow. Soon you'll hit 100k.
Great Work.

[jonathanford]

I never get tired of just how bizarre particle physics is.

[hcellix]

Thanks for taking your time to make a surprisingly good informative video on our universe. I plan to watch another one.

[dominicbriske]

Do you think you could do a video covering the Schrödinger Equation in relation to polar spherical harmonics and why the quantum numbers make the funky beautiful shapes of the electron orbitals (s, p, d, etc.) I heard there’s a lot of history behind it but haven’t yet heard a simplified, cohesive, and understandable explanation. Love the content as always!

[nomann]

You are genius. Soon you will be recognized throughout the world.

[prernabhatt]

your work is absolutely great so informative and explained well .

[OvalTBandit]

also i found that Physics videos by Eugene Khutoryansky help to explain the wave function duality as well 🙂

[rezamalihi]

Excellent explanation, thank you! ... Also, must say your presentation skills (combination of graphics and logical ordering of the info) are exceptionally clear! 👏👏

[sstrick]

It drives me insane thinking about how large the universe is; and its all made up of the tiniest of things! I'm sure we'll soon discover even tinier things!

[Shonade_Malik]

11:10 Does the down quark change into an up quark due to QCD?

[tedrex]

Do you mind terribly if I ask, do we have a theoretical energy value for the detection of gravitons and if so how far off reaching it are we, say compared to the LHC? I am dreadfully sorry if this is a stoopid question, I am afriad I am rather thick, even more so when it comes down to things related to maths and physics.
I always think of the gravitational fields as colours altering their hues in my head, silly I know but it seemed most natural to me. Unfortunately I fear this doesn't help your display problem, I am sorry I couldn't think of a better way.

[Ruundas]

Subscribed, and absolutly impressed by the accuracy and good explenations on this Channel. Here you can learn new things. Im so glad about your channel

[stephanieparker]

Great idea for a video! Happy to see you still creating, 🎉❤

[jaysonp]

That was the best demonstration of electromagnetism ever

[comb-t]

The Stable Nuclide N-Z Graph has got to be one of my favourite graphs in Physics tbh.