Photoelectric Basics

Рет қаралды 185,081

12 жыл бұрын

A basic rundown on some of the important properties of the photoelectric effect. To be used by my AP students to remember a little about it prior to the AP Test

Пікірлер: 70

@illget62intheexam9 3 жыл бұрын

what a legend .. my teacher has shown us this and sent me to thank you. thanks, man you have made over 15000 students understand this topic

@alastairpalm8150 7 жыл бұрын

Thank you. What a succinct and in depth description. I appreciate this illustration. Well done.

@PhysicsOnline 9 жыл бұрын

Very clear descriptions here that have really helped the students I teach. Thanks.

@oldaccountyeet5765 7 жыл бұрын

Really really good video. Love the simulation. Thank you!

@TimeTachyon 9 жыл бұрын

My A level /Foundation class enjoyed this excellent video! Thank you! Dr Mannion.

@rommel23nb 6 жыл бұрын

Very good animation and explanation I searched many but none served my purpose except this one So thank you.

@anilsinha4968 5 жыл бұрын

Excellent stuff. To know science better, one needs to see it. Technology is such a great help for that, things that books and sometimes even labs cannot do well.

@giadadamiani4453 7 жыл бұрын

Extremely helpful. Thank you!

@khoibui6191 8 жыл бұрын

Great!! Thanks for your explanation.

@fahimahmedbhuiyan2252 7 жыл бұрын

man this video just has convinced me.....thank u very much!!!

@TreeTriz 5 жыл бұрын

Great explanation! Helps a lot.

@MsJnjnjn 9 жыл бұрын

great to explain the concept with the simulator !

@nitinsuryawanshi2147 6 жыл бұрын

great demonstraion and explanation i ever seen . Thanks a lot..

@samakhanjani6522 10 ай бұрын

Thank you for your brilliant video! I wish you could show the current vs battery voltage graph, too.

@YelenaIzKislovodska 4 жыл бұрын

I'm not that smart and learning this stuff totally out of curiosity - but i got the idea pretty clearly after playing and watching it just two times! thank you !

@stephanielynn7825 11 жыл бұрын

Excellent explanation, thank you.

@prateekdhingra6957 5 жыл бұрын

Simply Excellent!

@ernestosaboia 6 жыл бұрын

Great video! It would be nice to recreate the experiment

@hadiyousef1704 7 жыл бұрын

wonderful explanation! if we were to say that the intensity of incident photons was to remain constant, but we increase the frequency energy of each incident photon will increase that's for sure! I've understood that fewer photons per unit time arrive and therefore fewer electrons are emitted but where is the proof for this? any help would be wonderful! cheers!

@dijonstreak 3 жыл бұрын

awesome demo using math, graph, animation.very clear concise presentayion..got a lot clearer now idea of the photoelectric effect and paricle physics..thanks to YOU. !!

@thephysicsaviary 3 жыл бұрын

Glad it was helpful!

@BeHappierThanMe 4 жыл бұрын

You are a god. My prof used a similar simulation but you seemed to be able to explain it better than him

@Malayjpatel 11 ай бұрын

Amazing visual representation! Claps!

@sindhumohandas1479 5 жыл бұрын

excellent..waiting for more videos..

@thomasgrant8020 7 жыл бұрын

Thank you!!!

@elijahchristopher8125 9 жыл бұрын

Thanks it was really helpful.

@shahbazali8751 8 жыл бұрын

realy nice explanation. thanx sir

@dylf14 11 жыл бұрын

Excellent video

@sumaiakassab 8 жыл бұрын

شكرا على التوضيح في الواقع انا استخدم موقع phet في الدروس وساعدني هذا الفيديو في التعرف على كيفية العرض بشكل جيد شكرا مرة اخرى

@CaptainCalculus 7 жыл бұрын

Next on K-Billy super-stars of the 70s, General Relativity...keep.on.truckin'

@ITZIDino 2 ай бұрын

it's funny that my teacher in his book have your video to explain this

@srinivassriram7889 10 жыл бұрын

very good helpful for teaching

@snaphousemedia7113 2 жыл бұрын

IT REALLY HELPED ALOT

@IndianaJaws 11 жыл бұрын

thanks, helped a lot :)

@qualquan 7 жыл бұрын

Question is why with any supra threhold light frequency at high intensity, multiple photons cannot simultaneously hit same electron? Why just one photon per electron at ALL frequencies all the time even at high intensities? Surely number of photons can be made to greatly exceed number of surface electrons. One would expect some electrons being hit by multiple photons. So why not?

@mohammadalihamidia7785 10 жыл бұрын

Really helpful, tnx:)

@lubomirvlcek9888 6 жыл бұрын

Hi , A particle moving in a transmission medium. Kinetic energy of a particle ( charge) moving at the velocity of v has two different values: Kinetic energy of a particle ( charge) Tkin id =mc^2 [ln |1-v/c|+ (v/c) / (1-v/c) ] in direction of motion of a particle ( charge) It is realy as Newton´s kinetic energy, where v is velocity of a particle ( charge) . Kinetic energy of a particle ( charge) Tkin ad = mc^2 [ln |1+v/c|- (v/c) / (1+v/c) ] against direction of motion of a particle ( charge) It is realy as Maxwell´s electromagnetic wave energy, where v is velocity of a particle ( charge). Corrected Third Newton's law of motion : All movements in physics are based on principle of action - reaction and on velocity of stable particles ( e-, p+,n0, D, He-3, α ). Action, as a motion of stable charged particles ( e-, p+,n0, D, He-3, α ), is characterized speeds up in source along ellipse or quasi- elipse ( excentricity e -> 0 ). Action creates unstable particles ( leptons μ−, τ−, baryons, mesons ), bosons W +, W-, Z (= particles = β electrons moving at nearly the speed of light )in direction of motion of stable particles ( e-, p+,n0, D, He-3, alfa ). Reaction creates into transmission medium, the electromagnetic waves, as unstable “particles” - neutrínos νe, νμ, ντ , mesons π0, π+ , π- , η , K and gamma rays (=waves of extremely high frequency >1019 Hz ) - against direction of motion of stable particles ( e-, p+,n0, D, He-3, alfa ). Accompanying activity of reaction on movement of stable particles in the transmission medium are waves, or “unstable particles“ respectively , i.e. neutrinos and mesons. vixra.org/author/lubomir_vlcek Extraordinary proofs: vixra.org/pdf/1506.0207v1.pdf New Trends in Physics CD Rom /book, Elementes Pictures, Spheres in Nuclei, Forecasted Nuclei vixra.org/pdf/1504.0082v1.pdf One Blink of Electron is the Basis Amount of Kinetic Energy 6.62606957x10-34 Js vixra.org/pdf/1503.0056v1.pdf Confirmation of the Theory Under Discussion Wave-Particle Duality as Kinetic Energy Against and in Direction of Motion in Discussion Group Theoretical Physics !!!! Eureka !!!! vixra.org/pdf/1502.0184v1.pdf Einstein's Theory of Relativity Can not Explain ... vixra.org/pdf/1501.0199v1.pdf Corrected Newton´s Laws of Motion vixra.org/pdf/1501.0198v1.pdf Principles for the Theory and Its Agreement with Experiment vixra.org/pdf/1501.0197v1.pdf Wave - Particle Duality as Kinetic Energy Against and In Direction of Motion. vixra.org/pdf/1412.0131v1.pdf Improvement of Classical Physics vixra.org/pdf/1412.0125v1.pdf Kinetic Energy According to Einstein and According the Latest Knowledge vixra.org/pdf/1411.0533v1.pdf Form of Intensity of the Moving Charge Electric Field is Asymmetrical. vixra.org/pdf/1411.0531v1.pdf Form of the Interference Field is Non-Linear vixra.org/pdf/1411.0530v1.pdf Kinetic Energy of a Charge Moving at the Velocity of V Has Two Different Values vixra.org/pdf/1409.0090v1.pdf Three Objections to Modern Physics vixra.org/pdf/1408.0185v1.pdf Protons Are Perfectly Stable or Their Lifetime is Enormous vixra.org/pdf/1408.0133v1.pdf Please Read my Articles in More Detail. vixra.org/pdf/1405.0355v1.pdf Movement Principles of Ufo vixra.org/pdf/1405.0334v1.pdf Kinetic Energy vixra.org/pdf/1405.0308v1.pdf Who is Right? vixra.org/pdf/1405.0307v1.pdf What is Quark? vixra.org/pdf/1405.0237v1.pdf L.vlcek Vixra, Getcited, Book, CD, Conferences 14.5.2014 vixra.org/pdf/1404.0471v1.pdf Superheavy Spherical Nuclei. Island of Stability vixra.org/pdf/1404.0369v1.pdf Neutrino Oscillations vixra.org/pdf/1404.0279v1.pdf Physics is Easy vixra.org/pdf/1404.0273v1.pdf Particles, Waves and Trends in Physics vixra.org/pdf/1404.0268v1.pdf Physics is Beautiful vixra.org/pdf/1404.0261v1.pdf Introduction to my Two Articles Physics is Easy and Physics is Beautiful vixra.org/pdf/1404.0253v1.pdf Orbit Radius and Speed of the Sun Around the Center of Gravity of the Solar System vixra.org/pdf/1404.0248v1.pdf Spectral line Hα vixra.org/pdf/1404.0246v1.pdf Shortened Great Table of Elementary Particles vixra.org/pdf/1404.0243v1.pdf Great Table of Elementary Particles vixra.org/pdf/1404.0238v1.pdf Movement Principles of the Fast-Spinning Bodies vixra.org/pdf/1404.0130v1.pdf Nuclear Fusion Critical examination of fundamentals in physics www.trendsinphysics.info/ academia.edu tuke.academia.edu/LubomirVlcek L. Vlcek, : New Trends in Physics, Slovak Academic Press, Bratislava 1996, ISBN 80-85665-64-6. Presentation on European Phys. Soc. 10th Gen. Conf. - Trends in Physics ( EPS 10) Sevilla , E 9. -13 September 1996, www.trendsinphysics.info/ vixra.org/pdf/1502.0184v1.pdf Einstein's theory of relativity can not explain ... Abstract 1. Movement principles of the fast-spinning pulsars, (vixra.org/pdf/1404.0238v1.pdf Movement Principles of the Fast-Spinning Bodies ) 2. Nuclear Fusion , ( vixra.org/pdf/1404.0130v1.pdf ) 3. Wave - Particle Duality as Kinetic Energy Against and In Direction of Motion 4. the 4th Maxwell's equation, (2.38) in www.trendsinphysics.info/kniha/2-1.html#2-1-3 5. Lorentz equals without the help of Space-Time, (2.23) - (2.27) in www.trendsinphysics.info/kniha/2-1.html#2-1-3 6.Confinement of quarks (vixra.org/pdf/1405.0307v1.pdf What is Quark? ) 7. Great Table of Elementary Particles ( vixra.org/pdf/1404.0243v1.pdf ) 8. Spectral line Hα ( vixra.org/pdf/1404.0248v1.pdf ň 9. Neutrino Oscillations ( vixra.org/pdf/1404.0369v1.pdf ) 10. Form of the interference field must be non-linear. ( vixra.org/pdf/1411.0531v1.pdf ) 11.Form of Intensity of the Moving Charge Electric Field must be asymmetrical. ( vixra.org/pdf/1411.0533v1.pdf ) 12.Kinetic energy of a charge moving at the velocity of v has two different values: Kinetic energy against direction of motion as wave Tkin ad = mc2 [ln |1+v/c|- (v/c)/(1+v/c)] Kinetic energy in direction of motion as particle Tkin id = mc2 [ln|1-v/c|+ (v/c)/(1-v/c)] ( vixra.org/pdf/1411.0530v1.pdf , vixra.org/pdf/1405.0334v1.pdf , vixra.org/pdf/1409.0090v1.pdf Three Objections to Modern Physics ) 13. Yukawa potential 1905 A.E. : Einstein ´s theory Tkin =mc^2 - mo c^2 1996: Tkin id =mc^2 [ln |1-v/c|+ (v/c) / (1-v/c) ] Tkin ad = mc^2 [ln |1+v/c|- (v/c) / (1+v/c) ] Einstein's theory works for v < 0.1c. v/c.......Tkin ad .................Tkin id ...............Tkin (A.E.) 0.1..... 0.00439 mc^2...0.0057 mc^2....0.0050 mo c^2 0.2.....0.0156 mc^2.....0.0268 mc^2......0.0200 mo c^2 0.3.....0.0316 mc^2.....0.0719 mc^2......0.0480 mo c^2 0.4.....0.0508 mc^2.....0.1558 mc^2......0.0910 mo c^2 0.5.....0.0722 mc^2.....0.3068 mc^2......0.1550 mo c^2 0.6.....0.0950 mc^2.....0.5837 mc^2......0.2500 mo c^2 0.7.....0.1174 mc^2.....1.1293 mc^2.......0.4010 mo c^2 0.8.....0.1434 mc^2.....2.3905 mc^2......0.6670 mo c^2 0.9.....0.1680 mc^2.....6.6974 mc^2......1.2930 mo c^2 0.99...0.1906 mc^2....94.3948 m^c2.....6.9200 mo c^2 1……....0.1931 mc^2..........infinite....................infinite www.trendsinphysics.info/ Why relativity works in some cases and fails in others ? Like Newton's theory works for small speeds v

@zyalword2 9 жыл бұрын

كيف اتحصل علي التنذبل المباشر للبريد الإلكتروني

@renugirotra4999 9 жыл бұрын

Hey I have a doubt... if we make the direction of potential of battery so as the electrons move in the direction ejected by light then why at a certain high voltage of battery.. a limiting value of current is reached.. ?

@jdmphys3040 9 жыл бұрын

Renu Girotra the current is limited by the number of electrons that jump off / are ejected from the metal plate. the number of electrons that jump off the metal plate is determined by the number of photons striking the metal plate. Changing the voltage doesn't impact the light's intensity/brightness (i.e., the number of photons striking the metal plate).

@renugirotra4999 9 жыл бұрын

Ohhhh..... sooo the thing is that in metal if we increase potential . Current keeps on increasing but here in a tube having an insulating medium... moving electrons are provided only due to irradiating light and hence its frequency limits the electrons... if there was a metal piece instead of this tube then the current must only depend on the potential... I get it ...thankyou so much -tushar

@renugirotra4999 9 жыл бұрын

I m referring to lights frequency

@vanchinathan7617 8 жыл бұрын

what is the direction of photocurrent?

@thephysicsaviary 8 жыл бұрын

+Vanchi Nathan the electrons will move through the circuit in a clockwise manner as depicted in the video. The "conventional" current envisions positive moving through the circuit and it would be in the counter clockwise direction.

@MadScientist267 2 жыл бұрын

Not sure how it shows the packet nature of light but not a bad explanation overall. This seems like it would be related to the reactivity series characteristics as well... Strong correlation?

@ralphgeneral4928 3 жыл бұрын

If energy is determine using V=W/q, we will say that W=qV right. Does this mean that the value of energy is negative since the stopping voltage is a negative value in this animation? Thanks

@thephysicsaviary 3 жыл бұрын

The work was negative because we took kinetic energy away from the electron. The original KE of the electron was positive.

@idonotcare3518 3 жыл бұрын

Very good

@ivasljiva4031 4 жыл бұрын

When you increase frequency (constant intensity) it shows increase in current . Since current is I=dQ/dt, it shouldnt be the case!?

@tamarapaterson9009 4 жыл бұрын

Increasing the frequency will increase the energy of the photons (E=hf). As higher energy photons are reaching the metal, more electrons are 'freed' from the metal. You are correct in stating the formula of current = charge per unit time. The current is a measurement of how many electrons move past a point. For the electrons to move past a point, they need to be released from the metal in the first place. Does that help?

@joachimoberle1993 3 жыл бұрын

Sorry Tamara. In my opinion you are not right. A Photon with a higher energy will not release more electrons but electrons with higher (kinetic) energy. To release more electrons you have to increase the intensity (=brightness) of a frequency which has enough energy.

@johnathonmackin 6 жыл бұрын

This guy sounds like Pauley Shore. Did Pauley Shore decide to teach basic QED and particle physics?

@ek9155 9 жыл бұрын

If the light is removed, do the electrons return to the metal? Can the metal ever run out of electrons, no longer be able to emit them?

@hailtonsimon7155 9 жыл бұрын

I don't think so. There will always be electrons to be emitted as longs as the hf energy is greater than the work-function. Thanks

@jdmphys3040 9 жыл бұрын

Hailton Simon The negative terminal of the battery replenishes the electrons in the metal emitting plate: every time an electron is ejected from the metal emitting plate, an electron exits the negative terminal of the battery and fills the spot left open by the ejected electron. In this way, there is always a row of negative charges lined up on the emitting plate. If you keep the light on for long enough (a really long time), then the battery will run out of juice and will suddenly become unable to replenish the ejected electrons. At this point, the total number of electrons in the metal could start to decrease since the ejected electrons are no longer being replaced. On the other hand, if you turn off the light, then you preserve the chemical "juice" in the battery--the battery gets to rest for a while, since a lack of light means no electron ejection, which means the electrons on the emitting plate don't have to be replenished.

@chemistrywithmariab6085 8 жыл бұрын

if the polarity of terminals change then current reach to zero why/;/

@tamarapaterson9009 4 жыл бұрын

The current will reach zero when the voltage reaches the 'stopping voltage'. This varies from metal to metal. This voltage does work on the electrons. W = qV. The kinetic energy of the electrons is less than the work done by the voltage, so the electrons have insufficient energy to cross to the collector (hence zero current).