A Level Physics Revision: All of Quantum Physics (in 25 minutes!)

[@georgeferguson5773]

Hi there great video just one small thing I think there is a mistake with the definition of the threshold frequency. I think you accidentally put the emission of a photon rather than electron

[@zhelyo_physics]

you are correct! : ) It should say "electron". Thanks!

[@petermwanza3680]

Yes to should say that s photo required to pull out an electron

[@CraftyMBs]

I think it happens again at 13:29 "emission of photons"

[@SpotterVideo]

Dr. Roger Penrose has suggested instead of trying to create a particle called the "graviton" to explain gravity, why not try to describe subatomic particles in terms of spatial curvature, as in the twist in a piece of real thread. What if we add one extra spatial dimension to the "Twistor Theory" of Dr. Roger Penrose? It can be "chiral" by having either Right-hand or Left-hand twist. It can be "Quantized", based on the number of twist cycles. If Physicists describe electrons as point particles with no volume, where is the mass of the particle? Can one extra spatial dimension produce a geometric explanation of the 1/2 spin of electrons? The following is an extension of the old Kaluza-Klein theory. Can a twisted 3D 4D soliton containing one extra spatial dimension help solve some of the current problems in Particle Physics? What do the Twistors of Roger Penrose and the Geometric Unity of Eric Weinstein and the exploration of one extra spatial dimension by Lisa Randall and the "Belt Trick" of Paul Dirac have in common? Is the following idea a “Quantized” model related to the “Vortex Theory” proposed by Maxwell and others during the 19th century? Is the best explanation of the current data a form of “Twistor Theory” first proposed by Dr. Roger Penrose during 1967? During recent years Dr. Peter Woit has explored Twistor Theory as a possible solution to help explain the current Standard Model. Has the concept of the “Aether” been resurrected from the dead and relabeled as the “Higgs Field”? In Spinors it takes two complete turns to get down the "rabbit hole" (Alpha Funnel 3D--->4D) to produce one twist cycle (1 Quantum unit). Can both Matter and Energy be described as "Quanta" of Spatial Curvature? (A string is revealed to be a twisted cord when viewed up close.) Mass= 1/Length, with each twist cycle of the 4D Hypertube proportional to Planck’s Constant. In this model Alpha equals the compactification ratio within the twistor cone, which is approximately 1/137. 1= Hypertubule diameter at 4D interface 137= Cone’s larger end diameter at 3D interface where the photons are absorbed or emitted. The 4D twisted Hypertubule gets longer or shorter as twisting or untwisting occurs. (720 degrees per twist cycle.) If quarks have not been isolated and gluons have not been isolated, how do we know they are not parts of the same thing? The tentacles of an octopus and the body of an octopus are parts of the same creature. Is there an alternative interpretation of "Asymptotic Freedom"? What if Quarks are actually made up of twisted tubes which become physically entangled with two other twisted tubes to produce a proton? Instead of the Strong Force being mediated by the constant exchange of gluons, it would be mediated by the physical entanglement of these twisted tubes. Are these the “Flux Tubes” being described by many Physicists today? When only two twisted tubules are entangled, a meson is produced which is unstable and rapidly unwinds (decays) into something else. A proton would be analogous to three twisted rubber bands becoming entangled and the "Quarks" would be the places where the tubes are tangled together. The behavior would be the same as rubber balls (representing the Quarks) connected with twisted rubber bands being separated from each other or placed closer together producing the exact same phenomenon as "Asymptotic Freedom" in protons and neutrons. The force would become greater as the balls are separated, but the force would become less if the balls were placed closer together. Therefore, the gluon is a synthetic particle (zero mass, zero charge) invented to explain the Strong Force. The "Color Force" is a consequence of the XYZ orientation entanglement of the twisted tubules. The two twisted tubule entanglement of Mesons is not stable and unwinds. It takes the entanglement of three twisted tubules to produce the stable proton. The term “entanglement” in this case is analogous to three twisted ropes being wrapped around each other in a way which causes all of the ropes to move if someone pulls one of the ropes. Does the phenomenon of “Asymptotic Freedom” provide evidence that this concept is the correct interpretation of the experimental data now available? Can the phenomenon of "Supercoiling" help explain the "Multiple Generations" of particles in the Standard Model? The conversion of twist to writhe cycles is well understood in the structure of DNA molecules. Can the conversion of twist to writhe cycles and vice-versa help explain "neutrino oscillations"? Within this model neutrinos are a small, twisted torus produced when a tube becomes overtwisted and breaks producing the small, closed loop of twisted tube (neutrino), and a twisted tube open on each end, which is shorter than the original. (Beta Decay) Within this subatomic model gravity is produced by a very small higher dimensional curvature imbalance within atoms, which causes all atoms to be attracted to all other atoms. This extremely weak attraction reveals the very small scale of the curvature imbalance. This produces the curvature of spacetime on a larger scale like the solar system which is required to counterbalance this small imbalance in the individual atoms.

[@manhaabdellah3474]

Just brilliant. I dont have words for this video. It's been 3 days im trying to make a plan to study quantum for the first time and this video cleared all in just a sitting of 25 minutes! 🙌 legend

[@zhelyo_physics]

Thank you so much for the comment!! Honestly, comments like these genuienly make my day. Glad this is useful!

[@kanishkabigzada367]

Sir, I did the paper 2 yesterday and everything you taught came up! I saw an experiment question on leds and plancks constant and had a fat smile on my face. THANK YOUUU

[@zhelyo_physics]

Glad to hear! Anytime!

[@sg_capo]

wheres that video

[@amygamesplays]

@@sg_capowatch the vid my dude

[@globglobpichu8373]

By far the best explanation out there I really had a hard time understanding quantum mechanics my exams are this may (from May 9) Thank you ♡

[@zhelyo_physics]

Glad to hear this is useful! Thank you for the kind words!

[@AK-wj1bz]

What’s your component?

[@ftbl_d1381]

How did it go

[@rifathtamannaathoi2020]

I was close to sobbing, I missed my teacher's lecture on this topic and after an hour and half of jumping from sources, I can finally say after watching this video, that I understand the topic. Thank you so much for the well thought out & easy to understand lecture. You earned yourself a subscriber signore!

[@zhelyo_physics]

Thank you so much for the kind words! I am glad this is useful!

[@Nebulight-jj5oq]

who else is here a night before

[@zhelyo_physics]

good luck today!

[@kokuyoedit8538]

not me

[@Sgkhjj]

Not me boss

[@Red-in9px]

I got the exam in 2 hrs 😭 5am rn

[@jackpainter8614]

I must thank you for your amazing videos, they are clear, enjoyable to watch and extremely helpful as they are for the course I am studying.

[@zhelyo_physics]

Thanks for watching, great to hear!

[@fredericosalianga1088]

amazed to see that all this great and logical explanation is only 25 minutes. Thank you so much for this

[@zhelyo_physics]

Great to hear this is helpful! Thank you so much for the comment!

[@TM-fk4po]

Hi from Zimbabwe 🇿🇼 my brother I really appreciate your content. Keep on Making physics a fun subject to learn

[@parthsindhal478]

great detailed vid with a solid clear explanation. Straight to the point.

[@zhelyo_physics]

Thanks a lot! : )

[@uzairasim1851]

Highly talented and most passionate teacher ever!!!! Thank uuu for everything u provide!!!!

[@zhelyo_physics]

Thank you so much for the kind comment! Very much appreciated!

[@louishubbard1113]

great video. I think its gonna be u that gets me through physics a level

[@zhelyo_physics]

hehe here to help! thanks for the comment!

[@rawcopper604]

Physics is really cool and you manage to explain it very well. Thank you.

[@zhelyo_physics]

Thank you for the comment!

[@ShadowVXMaster]

Revising this during y11 to get a head start in A-Level physics you make it sound so easy when it isnt

[@zhelyo_physics]

good luck!

[@yourlocalbicon4020]

thank you so much for all your videos! unfortunately my a level teacher can't teach very well but you explain everything so well!

[@AhmarAli2004]

The threshold frequency is the frequency of light that carries enough energy to dislodge an electron from the surface of a metal. definition in video states: remove a PHOTON from the surface...

[@zhelyo_physics]

Already states in previous comments and the description that it's a simple mix up of language : ) notes are correct.

[@sithumsankalpa7445]

You just made quantum physics Soo easy I’m confident for my AL exams tomorrow

[@zhelyo_physics]

Fantastic, good luck in the exam, you got this!

[@engineeringmadeasy]

8:01 second point, where you talk about (f0), --> (to release a photon) or (to release an electron), probably electron.

[@zhelyo_physics]

Yep!

[@teacupcakes2739]

19:05 got me confused and deaf because of how you repeated the same thing and suddenly started talking loud on mic

[@anashetechScieRobotics]

You are the BEST

[@zhelyo_physics]

thank you!

[@stillfl3]

a teach sent from heaven

[@zhelyo_physics]

Hah thanks for your comment!

[@huzeifazoher3521]

Correction : Threshold frequency is minimum amount of photon frequency needed to remove electron from a metal . I think this is what u meant

[@zhelyo_physics]

It is! Thanks!

[@patrickmajorczyk5168]

''The emission of photons depends only on the frequency of light, not on the intensity'' ----> I'm a bit confused as i thought it should say ''emission of electrons''. can you please explain?

[@zhelyo_physics]

Hi, I meant to say emission of electrons. My bad! Thanks!

[@patrickmajorczyk5168]

sorry i don't mean to be annoying but thank you for your quick response!@@zhelyo_physics

[@niallquadros]

Thank you so much sir!!!!!!!

[@zhelyo_physics]

Anytime!

[@59xthepain87]

very clear and detailed explanations, thanks!

[@zhelyo_physics]

anytime! thanks for the comment!

[@hadiyafarrukh3057]

Hello! Have you covered, absorption and emisson line spectra?

[@zhelyo_physics]

I have! : ) kzbin.info/www/bejne/jKunnZt5Z9CJfJosi=vPWwhu_Tc8ckfqps Let me know if anything doesn't make sense

[@mubaris.s]

18:50 my calculated answer is 4.917 and engineered answer is 491.7x10^9

[@hrishiv]

13:19 should say "...to release a photon frequency to release an ELECTRON from the surface of a metal..."

[@zhelyo_physics]

thanks for spotting this

[@zidanemehmood7424]

@@zhelyo_physicsNo problem

[@Unknownunknown-yy1yr]

Are photons and light the same thing? I can't visualise a particle containing light while also having zero mass.

[@zhelyo_physics]

excellent question. Yes, a photon is a particle of light. A good way to visualise it, if it strikes a metal, it will release an electron. That electron will have momentum, that has come from somewhere. Hope this helps!

[@ammarjaber9374]

thank u so much u make my life is more easier

[@zhelyo_physics]

Glad to hear that!

[@kausarlolz]

hi sir, what can we say about the formation of the concentric rings for the electron diffraction experiment?

[@zhelyo_physics]

I believe the mark scheme quotes the polycrystalline structure of graphite as the reason. I think there was a question on this recently. Another thing to note is that as you increase the voltage the spacing between the rings will decrease. Great experiment!

[@pratyasha279]

is that all we need to know for wave particle dual (towards the end)?

[@zhelyo_physics]

Mostly yes, I would just use your syllabus/specification as a checklist to ensure you have covered everything

[@eaglehawks4337]

Hello Sir, posting from an anon account because well I am embarassed and scared at the same time, I have my physics paper 4 exam on the 13th of May, I can still not solve yearlies independently - I do understand it through a youtube video / those pp solution videos but the i feel that the concepts aren't stored in my memory, I keep forgetting, I did topical pp of the chapters that I struggled with already, but even for those chapters, I can't keep the concepts in mind I don't have a decent grade in AS physics and don't know what to expect for A2, nor do I have v supportive college teachers who really understand (at least for physics) - + The amount of resources is insane, no one notes describe the complete concepts, every time i open a different set of notes there's something new to learn

[@eaglehawks4337]

I know this ain't the place to rant, but since you have always been so repsonsive with the comments, I would appreciate if you could please give some suggestions :(

[@zhelyo_physics]

You can do it! Never give up, but also don't put excessive pressure on yourself. If you understand things through videos/looking at solutions etc - great - that's a step up in the right direction. For keeping the concepts in mind I recommend spaced repetition. Other students that I have spoken to recommend Anki flash cards that you make yourself to help you remember (I have not tried it myself but others recommend it highly, if you do your own flash cards -include as much detail as possible) Keep doing past past papers and remember to not put too much pressure on yourself. Good luck and drop a comment if something in particular doesn't make sense!

[@eaglehawks4337]

@@zhelyo_physics Thank you so much sir, grateful

[@harshnair9055]

At 17:46 you've mentioned UV light twice but with contradicting statements.. did you mean to say visible light first and then UV light? Thanks! Other than that this video is really helpful!

[@zhelyo_physics]

You are correct, thanks for spotting it!

[@harshnair9055]

@@zhelyo_physics No worries!! I'm just going through all your videos before the exam on thursday :)

[@georgiaturner3310]

i could be in the wrong but both me and my teacher are in agreement. at time 6.27, you talk some about the threshold frequency and say that it is the energy required to release a photon. this may have been picked up already, but should it not be a photoelectron?

[@zhelyo_physics]

Hi, you are both correct! It's just a slip of the tongue, I meant to say photoelectron. Hope this helps! : )

[@UthmanSekinah]

I don't understand😢

[@sha3tyb0i41]

YOU ARE THE GUY FR

[@zhelyo_physics]

Glad this is useful! Good luck revising!

[@outmusic4683]

Actually incredible, helped me out so much with some late revision lmao XD

[@zhelyo_physics]

Glad to hear! Thank you for the comment!

[@notoriouscookie7066]

you forgot to mention hilbert space!

[@ummesuadskitchen1172]

Is this a part of 9702 p4

[@ingrid-z-79]

thankss so much!! it's so helpful to me :D

[@zhelyo_physics]

Glad to hear! Thanks for the comment!

[@DARK-nh6tf]

Thanks man ❤

[@zhelyo_physics]

Anytime!

[@learner6984]

is this suitable for learning in case if physics teacher gives suprise test

[@zhelyo_physics]

Yes

[@user-et7ek5zz6n]

how do i work out wavelength

[@zhelyo_physics]

typically just given with the paperwork of the LEDs : )

[@en20drayt87]

hc/e

[@fellowmemer5693]

Amazing video

[@zhelyo_physics]

thanks a lot for the comment! : )

[@fellowmemer5693]

@@zhelyo_physics No problem. Got a physics mock soon for my first year and they're testing us on Full AS. This announcement was a curveball, and likely your videos have been helping out

[@zhelyo_physics]

Sounds like this playlist might be useful: kzbin.info/aero/PLSygKZqfTjPC3hJ7nRSnnXTw3tI_o67dR Good luck on the mock!

[@fellowmemer5693]

@@zhelyo_physics haha that's exactly what I've been using

[@fellowmemer5693]

@@zhelyo_physics Oh also, I'm doing the AQA spec. Except the various practicals we gotta do, is there any differences I should watch out for when learning with your vids?

[@RR-ph1cf]

what about energy levels?

[@zhelyo_physics]

right here: kzbin.info/www/bejne/aojWY3Rsndilf5I

[@RR-ph1cf]

@@zhelyo_physics thanks

[@mohammadali-zz5uo]

Great Video, highly appreciated!!!. I just had one question, why did you multiply the K.E by 2 at around 18:30?

[@zhelyo_physics]

So as KE=1/2mv^2, rearrange for the velocity we would get sqrt sqrt(2KE/m)

[@Rayyaneditor]

sir are there any detailed videos on the topics covered in this one?

[@zhelyo_physics]

kzbin.info/aero/PLSygKZqfTjPCb6uhtv2dsWTNf72KkbBZt Enjoy! : )

[@Rayyaneditor]

Sir I don't see the planks LED experiment and gold lead experiment in 2022 Cambridge A levels syllabus? Is it included or not?

[@ariyanislam1895]

hello sir,did you make a video on electromagnetic induction?

[@zhelyo_physics]

of course! kzbin.info/www/bejne/iJu8ZpWQaaefbtE

[@todorokishouto9997]

I have a test on this in like 10 mins 😅

[@zhelyo_physics]

Good luck!

[@huzaifagujjar2762]

Sir ow there video on Stephan boltzman theory

[@zhelyo_physics]

Hi, do you mean the Stefan Boltzmann Law? It is included in my astrophysics video here: kzbin.info/www/bejne/aojWY3Rsndilf5I Hope this is helpful!

[@deathkiller939]

What about wave particle duality

[@zhelyo_physics]

Hi, it's at 22:30

[@talhakhosa3219]

bohr atomic model?

[@zhelyo_physics]

coming up in a future video : )

[@Echo-to4ex]

​@@zhelyo_physicstomorrow is my ppr not useful for me

[@talhakhosa3219]

@@Echo-to4ex lol

[@mridulagrawal2370]

wonderful thankss

[@zhelyo_physics]

No problem! : )

[@PatelHarnisha-g9j]

Can I use this video for aqa a level physics

[@zhelyo_physics]

Absolutely

[@merajnahid9125]

Sir do you have a video on alternating current?

[@zhelyo_physics]

not yet but on the list of my ideas it goes! : )

[@puddleduck1405]

thankssss

[@zhelyo_physics]

Anytime!

[@tjveyd]

Hi Sir, do you have a video on the de Broglie wavelength?

[@zhelyo_physics]

Hi! The theory is given in this video, you can use this time stamp: kzbin.info/www/bejne/Y4TYaJqZirisptU I have also done a practice question here: kzbin.info/www/bejne/o5LXoWN8i9Fpqas

[@auntpickle3804]

My Exam In 5 Hours damnn

[@zhelyo_physics]

Good luck!

[@ElenaPattichi-z4n]

💗💗

[@deltalima6703]

A level? High school. 👿