Photoelectric Effect Explained in Simple Words for Beginners
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- čas přidán 15. 06. 2024
- Photoelectric effect occurs when electromagnetic radiation above the threshold frequency of the given metallic surface, strikes the surface and releases electrons from it. This happens because light is made of massless particles called photons, which possess a certain amount of energy. When these photons strike the surface, they knock electrons off it; we call these photoelectron.
Just because a light ray has a high intensity doesn't mean that it will cause the photoelectric effect. It can only happen if the frequency of the light rays is equal to or greater than a given value-known as the threshold frequency-of the metal. In this video, we have explained the photoelectric effect, threshold frequency and the work function in simple words
Table of Content
Introduction: The Photoelectric Effect 0:00
Factors Influencing Photoelectron Emission: Intensity and Frequency 1:11
Work Function and Its Role in Photoelectron Emission 1:45
Historical Evolution: Becquerel to Einstein's Nobel Triumph 2:29
Solar Power Revolution: Photoelectric Effect in Photovoltaic Cells 2:49
Beyond Solar Power: Diverse Technological Applications 3:40
Conclusion: The Quantum Elegance of the Photoelectric Effect 4:06
#PhotoelectricEffect #RenewableEnergy #solarenergy
References:
ui.adsabs.harvard.edu/abs/200...
science.nasa.gov/learn/basics...
hyperphysics.phy-astr.gsu.edu/...
Original Article Link: www.scienceabc.com/pure-scien...
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bro you saved me literally i ve watched 3 teachers explain this and I couldnt get it until i made it here THANKS A MILLION
Glad you found it useful!
can't believe there aren't as many people that watch this as there should be.
It’s science videos that I’d actually watch outside school
for real@@Loirn-onajourney
You're video is so amazing, can i use your video for my thesis?
In fact, when light hits metal, part of the light is reflected, and what is not reflected accelerates the movement of electrons, heating the metal, but does not knock them out. After a certain heating, the metal goes into a liquid state, but does not lose any electrons
this is cool ... i really found a hard to study this but animation such like that always make it simple , thx
soo good
this is PERFECT
So nicee thank you
BRO THATS AMAZING
I understood that bro is a fan of DC ✅️
Will a blue light always kick off an electron according to photo electric effect as it has highest frequency
На самом деле при попадании света на метал часть света отражается, а та что не отразилась ускоряет движение электронов нагревая металл, но не выбивает их. После определённого нагрева металл переходит в жидкое состояние, но никаких электронов не теряет
Does it mean when we watch our devices, we eject of electrons of our eyes
If our eyes have less work function than the Radiation emitted from the device
the animation is the best
thanks a lot
You were doing well until you said that light is made of massless particles. That is simply not the case, no matter how many times people repeat it. Light is a quantum field that can only exchange quanta of energy that carry an angular momentum of one Planck unit. It's the angular momentum quantization together with angular momentum conservation that makes it look like material particles are involved. The human mind likes to imagine that discrete conserved quantities have a material carrier. We made this mistake twice before in form of the phlogiston and the aether. This is the third time that this fallacy come around. One would think that humans can learn from past mistakes, but that doesn't seem to be the case.
Wrong, photons are massless
@@mrdefaultynoob Light is NOT made of particles. ;-)
😭😭😭😭so cute and good
thanks a lot
Question:
Where do tye electrons go to after gettting emergy transfered from photons.
I am actually still a gcse student,just like these type of stuff, so i dont understand much of all of this.
I think they'll stay in atmosphere and get into atoms of gases
What about that hole which get generated after loosing an electron, how it get's it's electron back ? 3:20
Or that excited e- again transfers the energy ( to the next atom's e- ) & comes back to it's position again, from where it was excited initially...is this the case ?
Dimes di exist
There is something wrong here because if the light has a high intensity, it will knock out more electrons because a high intensity means more photons, and that means more electrons will come out of the metal.
No
It doesn't depend upon intensity
As for photoelectric effect you need minimum amount of fixed energy required to remove electron from different metal surfaces and it is different for different metal
High intensity doesn't mean there will be more electron coming out of metal surface
It depends on metal and the collisions occuring bw electrons
May might be a case where the electron absorb energy but do not come out at all because the energy absorb may be lost in collisions occuring inside the metal surface
ohhh, so you mean it will not remove more energy because of its metal nature? If that is the case, I think it will knock out more electrons in a time interval.@@prachitiwari890
@@prachitiwari890it’s like if you have a glass with water but isn’t full, you shake it with lesser than enough energy and it only rotates and swirls inside the glass(internal collisions), but only when you have more than the minimum amount of shaking the water gets enough energy to fall out the glass. That’s the idea right?
Such quantisation of light into particles, as opposed to the wave model, led to quantum mechanics, a paradigm Einstein didn’t like.
I'm an engineer, and . . .