Quantum Physics: The Science That Defies All Logic | Secrets Of Quantum Physics | Progress

Join Professor Jim Al-Khalili on an intriguing journey through the enigmatic realm of quantum physics, a scientific theory that has baffled and fascinated minds since the early 20th century. It all began with a seemingly innocuous question about the functioning of light bulbs, leading scientists on a profound exploration into the sub-atomic universe, where the ordinary rules of reality are flipped upside down.

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[essexlad]

Now this is what youtube is all about! 2 hours of pure bliss.

[personagrata]

@40:00 For those interested, the Helium "problem" refers to stars early in the age of the universe with only about 1/3 of the helium expected, helium being produced by fusion within stars of hydrogen. Measurements showed more carbon, nitrogen, and oxygen in the stars than expected, which leaves open this question of where did all the helium, one of the most abundant elements in the observable universe, come from? As this measurement of helium came from a small sample of stars it could simply be an anomaly, or if actually representative it could suggest that there was some kind of secondary fusion taking place outside of the stars converting hydrogen to helium. I'm not an expert but I believe that these days the more common belief is that how much of a particular element stars produce is based upon their characteristics like their mass.

[Aditya-ygce]

There is something about how Prof Khalili explains things that make me nod my head as if I understood things which i could never comprehend, like ever.

[Favourites]

Hell yes!!! More docs with Herr Al-Khalili are always welcome. This guy should have his own channel! Thanks a lot!

[xfan]

Mr. Cook- why you chose to end your life is a mystery to me- but watching you set up and demonstrate the two slit experiment drove me to be a physics teacher. You made a difference…you did… because I have been blessed to have taught students who have accomplished so much ! You truly did change the world because you inspired a basic kid to do so much better…

[monicarenee]

I studied quantum physics in college and have watched endless amounts of quantum physics related content on YouTube, and I’ll say the card dealing example is one of the best ways I’ve seen Bell’s experiment explained. Made it very clear for someone seeing this for the first time or even anyone really struggling to understand

[cetateanu]

I never liked the school.But I loved physics lectures.I left the school and now I am watching quantum physics and can easily understand.
Thank you, Sir!

[VernonNelson-rb]

What an incredibly simple explanation of a mind-boggling idea. My first psychedelic experience changed my life. This video has changed my understanding of the world. I have no experience in physics at all... But this video has Open my mind to a world I did not know existed.

[pentagrammaton]

Physics doesn't break down at quantum levels, but our understanding of physics does.

[timredd]

Jim, in his special way of explaining the complexity of physics, makes it simpler, so the understanding of it appeals to a layman of the subject.

[michael.forkert]

@ 28:00 You can enjoy Jim Al Khalili giving his lecture about Quantum Mechanics on a bar counter at the sound of jazz music American Jazz Musicians were exporting to the whole world. That’s really the modern Physic at its finest. Really! Congrats Mr. Khalili 🎉🎉

[JohnJackson-mnts]

The answer “I don’t know” is where new ideas and new science is found.

[danielpaulson]

Thanks for re-posting this fine science material featuring a favorite, Prof Jim Al-Khalili. People will watch the Big Bang Theory, TV Sitcom again and again. I like re-watching good science shows.

[bigguy]

I've seen all the laws broken here on Earth: time, motion, potential energy, kinetic energy, gravity, all of it. I watched time stop for all objects except me, same for gravity and motion. A clump of dirt flew in and was frozen in front of me. I also forgot that I was in the middle of a car accident and the car was in the air as well as we hit an embankment at 85 mph. All I cared about was what this thing was that flew in the car. It looked like dirt but dirt doesn't fly and stop. I had to scoot up to see it better. I still couldn't see it so I had to loosen my seatbelt to scoot all the way up. I put my eyeball right next to it and saw that it was a clump of dirt. Then I remembered about the car accident and had a quick panic attack. I checked my seatbelt and looked at my friend. His face was frozen just like the sand. I saw his seatbelt on, then boom. Time came back on. My friend didn't have it happen to him.

It was like pushing pause on our environment including my friend; pausing everything except me. I stayed in normal time, gravity still worked for me as I wasn't floating. The sand looked still floating in the air. I figure that it took about 15-20 seconds to scoot up, then again, then freak out, finally check our seatbelts. It wasn't an adrenalin rush like everyone says. I was completely calm and normal until I remembered what was happening and realized that time was stopped. Then I freaked out, but before that I was normal.

That is one of like 25 stories that happened to me. When I was ten years old, it happened in front of my parents. I was doing my homework and the phone started ringing. I looked at my dad and he didn't move at all. Looked at my mom, the same. I get up kind of upset nobody was getting the phone when I was trying to do my homework. My dad looked at me like WTF and my mom got up from the other conjoined room to see what I was talking about. When I got to the phone and was reaching for it, it rang for real. The two rings overlapped each other causing a much louder ring. I was instantly sick and going to faint, but my mom caught me by my cheeks and told me I had a gift of ESP. I slept for a day and a half. There's two. This life is an illusion, a simulation. I know that's hard to believe unless what happened to me happened to you, then after thinking about it for 30 years, you would have the same conclusion as I have had. It has to be a simulation. All of you are simulated.
Why am I writing this then if you already know that? I guess for the chance that someone may know how to get out of the simulation. The

[jk-video]

Sir, your explanations are WONDERFUL! I have always thought of reality as obeying laws that are sensible, but quantum physics gives the impression of not doing this. String theory attempts to make things a bit more sensible, but probably is not the answer. In any case, the way that you put real world explanations to these things is so very good.

[jean-claudesteffens]

This is just the explanation about quantum mechanics I was waiting for in years. Thank you for that Professor Al-Khalili. In my understanding Physics is aimed at associating models (numbers and equations) to the real things. Models are there to predict the result of future experiments, which then prove if they were right (aka: applicable) or wrong. So I have no problem if a (relatively) free standing electron, or a crashing electron on a detector follows the particle model, while a fast traveling electron fired by the gun follows the probabilistic wave model. What I miss in this case is a description of how properties of the electron are modified when it is "fired" (or: what makes it "evaporate" to a probabilistic wave). Similarly, how the electron properties are modified when it is "detected", "measured" or when the probabilistic wave "crashes" on some obstacle to crystallize again as a particle at a (somewhat predictable) random place in space. Studying these transitions could be more profitable than arguing on "which reality is real". Concerning entanglement, did someone look at it as two crystallization's of a single wave ? The video suggests that the second coin continues to turn when the first one is fixed. Isn't that misleading ? when the first one is "detected", what if the second one has been displaced out of reach of a detector ?

[benjohnson]

All matter is connected and all matter communicates at the subatomic level, this is how ideas become realities.

[johnclancy]

seriously this guy should be required reading in schools explains things very clear and concise learning is fun again !! bloody smart chap.

[CamillaPerez-brdg]

The only man who defies his own theories by never growing older.
The much loved Jim Alkahili

[cresenteayo]

In 4th year highschool one of my favorites is Physics. Two Sections A and B attended these class altogether about 50 senior students. In short quizes involving formulas I beat the best and honor students so do in world history subject. My physics teacher was surprised why I was leading while honor students tailed behind me. But that inclination halted in college my course is different from my academic interest.