Grade 12 Physics | Photoelectric effect| Full lesson
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- Опубліковано 19 гру 2024
- Optical phenomena and material properties
In this lesson you will learn the necessary theory on the Photoelectric effect:
the duality of light
the wave nature and the particle nature of light
what is a photon
how to calculate the Energy of a photon
how to calculate the work function of a metal
what is the threshold frequency
how does intensity affect the Photo-current
All of this compressed into one lesson.
Finally I also tackle one past-exam question from SC/NSC 2019 Exam
Enjoy!!!
❤❤Here for Friday's paper. Matric 2024
❤❤❤
Just Went From Level 1 In Physical Science To Level 3 In First Term And From Level 3 To 5 In Second Term And Aiming For 7 In My Examination
Wow!!! Wow!!! Wow!!! It’s the confidence for me 🔥🔥🔥🔥🔥🔥
Did you get it?
2 years later and I also wanna know if you got the code 7 for your final examinations🙏
I watched this in 1.5x speed and understood in 30 minutes 😭 you explained in 30 minutes what my teacher couldn’t in 3 hrs.
I can only imagine what I sound like at higher speed 😂. I wouldn't dare listen to myself...
Thank you so much. Please do appreciate your teacher's efforts as well. S/he is doing their best under the circumstance...
Lol you also writing tomorrow neh😭💔
@@MlungisiNkosi I actually listen to all your videos at x2 speed because I want to watch ALL the content in time💪🏆
@@ruthc6791 I can only imagine how weird I sound 😂
I thought i was the only ond who did that , it's either 1,5x or 2x 😂😂❤️ love this guy , he's brilliant. Some of our student teachers watch his videos then they come teach us in class what he says on his videos WORD FOR WORD and i go like uh oh I've heard this before..but i probably would too he's just too good😂
Law of Mlungisi-States that the more you watch his videos, the more you will pass Maths and Science at lesser work done per unit time
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Mlungisi watchtime is directly proportional to maths and physics marks
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And le wena o tloba star 🌟
Just watch those results as they transform
@@MlungisiNkosi mine are transforming already, from getting level 3, I'm now on level 5 but aiming for level 7.🥰
Bo serious joh ❤
All of your videos are different in their own way✔🙂. The is a very painful thing, watching a lesson or a video several times but still don't understand what is happening, I've experienced that and I ended up accepting that physics is not 4me. but now that I am a part of this family I love physics and I know every chapter from the start😊 I understand everything, because of you Sir, you are a blessing from God 😊💗
You scared me a bit in how you started... Lol.
But I love the build up to your story. Thank you so much and I'm wishing all of God's best as you prepare for exams. Keep up the great work
Am so hurt that u gonna start mathematics when am no longer in high school I don't know whether I'm gonna need maths there or not😖, but my maths teacher is like you🤓😉she makes everything easy☺
But sir why teachers who teach physics or maths don't teach both of them🤔?
@@samkelisiwembulawa363 those that can.. Do.
Thank you sir. Your videos really help us out here. I got 93% for Physical Science in September and I am aiming to get 100% in my final exam
Please give me tips 😢
Am stuck on 80's
Me too ey I really need those tips 😭
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I celebrate with you... Well done. 😊
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Every since i have been watching your channel i have improved in my physics,
I went from level 3 to level 6.
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Our MINISTER of PHYSICS😎ENJOYED IT🤜🤛
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Man bless your Soul I have my prelims tomorrow and I just want to say thank you you've saved me and a lot of others heartache. I hope more physics students discover this channel and again thank you.
It's my sincere pleasure...
sometimes i get teary eyed mid video because i appreciate you sharing your teaching ability to help those of us that struggle to understand. Thank you so much
You are so welcome… You comment fills me with tears
writing my final tomorrow and this is my first time fully understanding this topic , thank you so much sir [ literally just started studying an hour ago😔]
From level 1 to level 5
Thank you sir❣️❣️❣️❣️❣️
🥳🥳🥳
Interesting chapter I love it. One of the chapters I really need to focus on and do research on when I will be doing my master's degree. I relate to the energy of the photon as the force applied and work function as the static friction of the object. In order for a person to move/accelerate an object, the person must overcome the static friction of the object. And so in this case the energy of the photon which is force applied must be greater than the work function for the electrons to be emitted.
Excellent sir... It is exactly the same thinking.
Jeez Brue,what an explanation,big it up by the way and good luck on your masters
@@siyabulelampinge564 Thanks man 🙏
Man, you're good with this. I am a civil engineer, but I missed some of the most essential lessons. Thanks for helping us catch up thanks.
Thanks for your hard work in producing these videos! I'm a 90% Physical Science student and it always helps to have good videos that I can use as refreshers or to build a better understanding on fundamental concepts I may have forgotten over time.
It’s my pleasure. You’re most welcome
@@MlungisiNkosiif given v how do i know whether it's vrms or vmax?
I have a good likely of finding this channel before my trial exam
Welcome to the family 🥳
I have been struggled in this lesson for so long, thank you for making this video you really cleared all my confusion. Appreciated it😭❤️
I wish I found this channel before my prelims, I’ve watched all of them and I understand my work. 😩🤝
Askies... Now that you have discovered this gold mine, do share it with others. All the best for your exams
Your lessons just made my revisions simple and manageable ❤️👌🏾
It's my pleasure... You are welcome.
Thanx a lot Dr Nkosi. I am so empowered listening to this video
Writing tomorrow and this is my first time understanding this. Thank you sir
You’re most welcome
I'm so gonna slay my exams with these...thank you sooooo much
Yeah... Let's do that. 😄
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Keep it up. Let’s gooooo
this section does not require that much work and energy tbh, you are saving us from 100 pages of textbooks just to grasp these basics you covered in less than an hour
It is my pleasure 😇
I now have hope in this subject. I am much grateful sir ❤
You're welcome
No cap😂😂... Hope once again
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You are very welcome and thank you
This has been the most helpful video! I've been stumped on this and watched so many vids to try to figure it out. thank you so much!!
You’re welcome
You've helped me improve my physical science marks from 80% in term 2 to 90% in prelims. Im hoping to increase it even more for the coming finals!
Well done ❤️
What mark you got in Final exam?
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Thank you ❤️
I'm writing physics in 20 days if am not mistaken. And I'm really struggling in physics but I'll hope I'll get a good level when I get my statement. But you surely are a good teacher ❤thank you sir.
Thank you so much
Thank you so much sir
for saving me in this topic
Just preparing for my exam tomorrow
How i wish you my teacher from grade 10,lesseons are so understandable
I am now... 🤗
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Nothing makes me happier 😊
Thank you so much Mr Nkosi, i really appreciate you
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I'll be visiting your page whenever I get stuck in the future.
You're most welcome... Please feel free to use this channel as a resource whenever you need to. Don't forget to subscribe 😊
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The pleasure is all mine
When sir said not that type of weed
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I'm glad you got the humour
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Sir was like" Not that kind of weed"😂🤞🏼 13:12
Good day, Sir....I'd like to start by applauding you for all your phenomenal physical science videos and teaching techniques, they really do come in handy and are much appreciated....But I have a request for you to please dig further on the photoelectric effect and perhaps do a video on the emission and absorption spectrum as I have a problem understanding the concept....Looking forward to your response Sir
Bitso... I've heard you and I'll do the right thing 👍🏾
Best tutor i have ever seen
thank you so much i now understand the photo electric effect much better now 😊😊😊😊
It’s my pleasure
Thank you for the video I really understood (I've been struggling with this topic so this was a huge help) 🙏
You’re most welcome 🤗
What a fascinating lesson!thank you sir!👋😍
Glad you liked it!
THANK YOU SO MUCH FOR YOUR VIDEOS NOWADAYS I KNOW HOW TO ANSWER THIS KINDS OF QNS ONLY BECAUSE OF YOU THANK YOU SO MUCH
It's my pleasure.
Thank you sir......how I wish that my online classes be like this one😱🔥
You’re welcome
Thank God I’ve come across this three weeks before my exams😍
You got this!
This guy is a legend
Thank you 🤗
I do appreciate your efforts Sir
It’s my pleasure
This is top notch mnr, thank you so so much
You’re most welcome
No one gonna talk about “not that type of weed” 🤣🤣🤣 we love you sir❤️
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Your uncle knows how you guys think
Wow i understood it just like that.. 😀 u are amazing sir give us more videos👍👍
You’re welcome
Any grade 12 here?❤
❤❤❤
Thank you so much for this Ankel
Thnks bro, your videos have been so on point. Please do one on uniform circular motion .
You're welcome... May I please find out which area/country you're from?
Dankie sir 💯💯o star🌟
Danko 😊
Writing today , and let's get those distinctions ❤️✌️
All the best
Thank u. This was really helpful 👏
Glad it was helpful!
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Please give me one
Thank you so much sir🙏. Inkosi ikubusise.
You are most welcome 😊
Anybody else trying to save their grades before it's too late. Dankie malume
Let the grades be saved on time…
Been waiting for this!!!!
Thank u so so much
Be sure to check out the one after it.
@@MlungisiNkosi
Will do sir.the notifications will ofcourse alert me😊
Ur videos are hleping me so so much ...more often during this time since the schools are closed.
@@MlungisiNkosi
And sir may we please try to atleast do last 2 or 4 more questions on circiuts because iam kind of struggling 😭
@@meganheher7975 That's the reason I'll do my best to get as many lessons in as much as I can.
🎉🙏❤️❤️thanks to our ankel
Amazing explanation!
My pleasure
In Mlungisi Nkosi I believe 😤🔥❤
Lol... Thank you so much
This has been so helpful 😭
I'm glad... 😊
Educative and easy to understand
Thank you
Is it important for us to know or study about cut-off wavelength?
Well, frequency and wavelength are related. It's worth knowing that relationship and being able how to apply it in the context of a question.
Thank you SIR 👏👏👏👏👏👏👏
You are most welcome. I'm glad I could assist...
According toI=Q/t
since charge increases, current increases, how is time affected? If i were to use the equation to explain.
however in an equation, there should be a variable that increases, decreases and a constant one. BUT its not so with this equation. Please clarrify this.
Well, if it takes a lesser amount of time for the same amount of current to pass, then current has increased.
amazing 😭thank you so much
Thank you 🙂
If ure given v..how do u know whether it's vrms or vmsx?
You will be told
Thank you sir l think l understand now 👍🤝
You’re most welcome
You helped me a lot❤️
You’re welcome
Hi sir.pls some videos in preparation for physics this Friday. Thank u
Can we use E=mc² also to calculate the energy if we know the mass ?
Absolutely...
@@MlungisiNkosi after last term watching your vids I managed to get 96% … thanks
@@evloghmenosxxx4035 this is awesome... Keep going 😍
this is so helpful thank you so much sir😭❤❤but sir can you make a lesson on the emission and absorption spectra
I will do so… 😊
Hi sir, is work function the same as threshold frequency?
No, but they are related... Work function is the minimum energy required whereas threshold frequency required.
Sir for the last question 10.4 , will the same happen for voltage?
Yes
"Not that kind of weed"...
Lol.
Other than that sir, as'bonge!
😂😂😂😂😂😂😂😂
Danko!!!
May we please do prepatory past papers
Which sections?
@@MlungisiNkosi maybe a full 2020 paper
class of 2023 to us that got 2hrs left and watching this video in 1.5 speed
Thank you so much sir.
You're welcome
Decrease in intensity results in decrease of emission electrons and kinetic energy what happens to it?
does kinetic energy also stay the same?
@@hlumisanamba9095 Kinetic energy stays constant 😊
Hello sir do you work on IEB papers
Yes there are on the channel… please check it in the videos section
sir what is meant by A negative Kinetic energy💔
There is no such… Kinetic energy is a scalar quantity
❤️🔥❤️🔥❤️🔥thank you sir !
My pleasure... Let's keep working
This is awesome!!
Thank you
You the best..
Thank you
Thanks mr Mlungisi🙏🙏🙏
You’re welcome
Hi sir can you do the kzn 2022 September physics paper 1 electrostatic and circuit question...really got stomped by it during exams
Please send me that question paper
😂😂😂 I'm sure angikho alone obecabang insango😂😂 la 13:13
God bless you Sir🥺
Thank you
Thank you👐✌
Awesome!!!
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Thank you sir✔✔
You're welcome