there is a photo sensitive liquid when mixed with green ink and written on a white paper, it appears transparent and when viewed through purple lenses we could see the written text. what is the phenomenon behind it or is it a simple trick. Ive seen a text written with red marker on white paper and with red lenses it becomes invisible but visible without glasses. my question is how to do this vice versa. invisible to naked eye but visible through lenses. is it a combination of colors with text and glasses or is it a specific color that appears differently when viewed through purple shade.
Sir i am also a KV student from KV IISc blr. I dont understand the teaching of my physics teacher as it is very brief.It would be great if you made a video on applications of total internal reflection and geometrical optics . thank you sir .
Thank you for such a good explanation sir. I want to buy these polaroids so please could u tell me what should i ask for...i mean whats the another name of it. and where should i go to buy it?
Good experiment Sir. What you trying to tell to viewers ....What reason behind blocking light and third polarized filter visible light ...And please give explanation sir...
The polaroids have perpendicular axes . That is to say that the first polaroid used is already positioned perpendicular to the second one in the stand itself so your understanding is perfect !
By intensity max they don't mean to say that intensity is max what they actually mean is that *Ofcourse intensity will decrease but for parallel there will be least decrease(max). got it?
You can find good filters on amazon for relatively low prices. Here is an example : www.amazon.ca/gp/product/B004X3XFHU/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1 These are NOT the filters used in the video but they are more than sufficient to do such an experiment. If you're looking for polarizing filters to do this kind of experiences, search for "linear polarizing filters" and not "circular polarizing filters". Also, don't waste your money on filter that are made for photography (big round shaped ones usually), small square shaped linear filters are usually the less expensive and the most practical.
Sir did u put second Polaroid perpendicular to first Polaroid if yes then angle must be 90° and according to malus law cos 90° =0 and intensity should be 0. Plz explain this
He had already made the second polarizer stand in at 90° angle to the first one.So when you see it parallel it is 90° and when you see it perpendicular it is parallel.So this is happening.
In case we use color fan blade like that could geometrically arrange to encoded the sun light down to city like in Moscow onion dome with painted colors could drive entire city mood, Vegetable DNA and could be even wind and rain are affected or create brain activities capacity or alertness of brain potential
![Seungmin "그렇게, 천천히, 우리(As we are)" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/kAzmhLHePqU/mqdefault.jpg)
Hope every school has a such good teachers and lab experiments done rather than just taking admission in college and learning from coachings only!
You are right bro
Not a chance dude. No teachers in my school are like him😢😢
Really fascinating to watch,its just amazing to see Sir providing actual practical based knowledge
Completely mesmerised! I didn't get the concept prior to it but now it's cyrstal clear. Thanks to u sir... It's trully grandiose
Practical is the soul of physics 👍
Watching this from Bangladesh. Love and respect for you, sir.
Thank u sir ji...for solving my confusions..
Thank you so much from korea
This is an experiment of Kendriya Vidyalaya (Central Institution) in India 😊
I just loved.. this video.....after second Polaroid became dark....my excitement increased a lot .........
Sir... U should have done the expt in a dark room.... Still... Marvellous explanation
Nice lec. I understood easily by looking this video ...... Thanks sir 🙏 for explaination in easy way.
You did an amazing job sir😃...very much impressive. I would love to have more such practical videos from you.
Overwhelmingly thank you for your effort sir please do more
Excellent physics lecturer, This type teaching need for the children
there is a photo sensitive liquid when mixed with green ink and written on a white paper, it appears transparent and when viewed through purple lenses we could see the written text. what is the phenomenon behind it or is it a simple trick. Ive seen a text written with red marker on white paper and with red lenses it becomes invisible but visible without glasses. my question is how to do this vice versa. invisible to naked eye but visible through lenses. is it a combination of colors with text and glasses or is it a specific color that appears differently when viewed through purple shade.
Great demonstration sir👏👏👏👏👏appreciate your effort and dedication
You inspire us.
Made me understand the concept at one go.
... From a Biology student
We need teachers like you in schools
4:12 Me be like: reh vai kaise kaiseee kaisee ho raha hai....🧐😒
Then comes sir's explanation which gave me a mental peace ...😌😌
Amazing 👌🙌🙌🙌 hmare school/clg m aise awesome teacher Kyu nhi the.....ek b din goal na marti mai
Very fascinating!!! Loved it
I have practicaks in 2 hr....thankyou for this!!! 🙂
To a layman, this will qualify as magic.
Thank you sir, such a teacher need every student
🙏helped me a lot teacher!Thank you!
Its an excellent demonstration Sir...
Great teaching style.
Thanks sir
Tq u so much sir it's too easy for understanding the polarization concept
Amazing sirrr. Really became a fan of you
Thanks sir for such amazing experiment 🔥🔥🔥🔥🔥
Excellent experiment. Experiment explains easily, which word can't explain.
Pure treasure on the internet 😊🔥❤👍🙏
It was mind blowing to study this topic sir because of this experiment. 🙏
U r the best Physics teacher
Deeply thankfulll sir. ,💕💕
Wish I had such experimental teachers......
Marvelous explanation sir👍👍👍👍
East or west kv sirs are best
$$$%%%&&&dout cleared
Best and dedicated teacher 🙏
So good explanation god bless you ❤️
Awsome , please make more practical videos of demonstration
Please
Sir i am also a KV student from KV IISc blr. I dont understand the teaching of my physics teacher as it is very brief.It would be great if you made a video on applications of total internal reflection and geometrical optics . thank you sir .
what a good teacher.....hats off sir......
Really science 💡 is magic 🔥🔥
thank u very much sir . you have explained the concept very well .
Sir you are extraordinary.....❤️
Thank you so much sir.. now my concept of polarization become clear😃
Really nice ❤️❤️
Keep posting videos. We should learn practical knowledge besides theory.
Really exallent sir we request to do some more experiment to avoid our confusions
Excellent experiment and demonstration ❤️
Ending part, how did it glow in the end?
What if you replace the torch with a laser beam?
Thank you for such a good explanation sir.
I want to buy these polaroids so please could u tell me what should i ask for...i mean whats the another name of it. and where should i go to buy it?
Hey
This is how practical's should be
Crystal clear
Very nicely shown👍👍
Wonderful explanation sir 🙏🏻
wwwoooowwww very impressive sir.good job
Very useful thanks sir
Good experiment Sir. What you trying to tell to viewers ....What reason behind blocking light and third polarized filter visible light ...And please give explanation sir...
Good....helped me lot 😶👏👏🎉👍
Super teaching skills
Sir where can I get those Polaroid sheet?
Sir your explanation is very good and make more videos on various concepts by Theoretically and experimentally it would be help full many students
Sachin Rana OP ❤️
Helped a lot.......tq u sooo much sirr
Excellent experiment
Amazing sir thank you
Sir but Humne to pada hai jab dono polaroid parallel hote hai to intensi max Hoti hai aur jab perpendicular hote hai to minimum
Same doubt..🤔🤔🤔🤔🤔
But i think the pollarid which we studied is tourmaline polarid and it is another one polarid sayad tbhi value of theta is different🖎🖎🖎🖎🖎🖎
The polaroids have perpendicular axes .
That is to say that the first polaroid used is already positioned perpendicular to the second one in the stand itself so your understanding is perfect !
U first listen what he says he says what u r asking
By intensity max they don't mean to say that intensity is max what they actually mean is that *Ofcourse intensity will decrease but for parallel there will be least decrease(max). got it?
That students must be blessed!
I got full clarity about polarisation sir tq sir
Best explanation ever❤
Amazing sir, Thank you
Can you send the link to buy the poleroid
Thank you sir excellent explanation
Doing great job Sir
Clear explanation tq so much sir
sir ples kindly tell me from where did you got the polariser
You can find good filters on amazon for relatively low prices. Here is an example : www.amazon.ca/gp/product/B004X3XFHU/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1
These are NOT the filters used in the video but they are more than sufficient to do such an experiment. If you're looking for polarizing filters to do this kind of experiences, search for "linear polarizing filters" and not "circular polarizing filters". Also, don't waste your money on filter that are made for photography (big round shaped ones usually), small square shaped linear filters are usually the less expensive and the most practical.
please upload the experiments so that the students from 8,9,10 all over India will get the benefit
Perfect!!!!!!
Can I get opportunity to work with you sir?
Thanks alot sir for explaining that
Thank you so much!🤙💫
That was amazing
Thank u sir
Really nice tutorial
Nice explanation
Tqsm for this video 🙏🏻🙏🏻
Awsom🧐
well explained sir
This was helpful thnx
From where to get that film
I really loved it
My physics teacher suggested me to watch this video
Sir did u put second Polaroid perpendicular to first Polaroid if yes then angle must be 90° and according to malus law cos 90° =0 and intensity should be 0.
Plz explain this
He had already made the second polarizer stand in at 90° angle to the first one.So when you see it parallel it is 90° and when you see it perpendicular it is parallel.So this is happening.
@@alphakumar6511 and why it seems like this??
In simple words when he has kept polarizer on table they are already at 90°.Don't think they are parallel.
@@alphakumar6511 ohh now I got it thnx😊
@It’s Syrup ok thank you🤗
In case we use color fan blade like that could geometrically arrange to encoded the sun light down to city like in Moscow onion dome with painted colors could drive entire city mood, Vegetable DNA and could be even wind and rain are affected or create brain activities capacity or alertness of brain potential
Nice sirji
Great 👍 explanation sir
Amazing sir
thank you sir.
Wow 😮 nice pronunciation
NOICE
did anyone notice that the reflection of the torch on the tile .... it's reduced intensity...as we know that reflection gives us 100% polarization...
yup...I noticed