Scattering of light & Tyndall effect

Let's explore the scattering of light with the help of an experiment. When we shine a laser through a glass of water with few drops of milk, we can see the path of light. This effect is often called the Tyndall effect. Created by Mahesh Shenoy

[@Clive.kut2221]

This is how every student should get the concept explained from school.Just the perfect and on point explanation

[@chelizicheesecake]

Very detailed and comprehensive explanation. Well done, sir!

[@kihustle6184]

It's a blessing that I found you sir. I like your explanations very much

[@darshinimd8973]

It's funny how when I was younger I used to think the dust is visible because of sunlight, but now I realise it's the other way round. *We see the sunbeam because of the dust particles*

[@KhanAcademyIndiaEnglish]

I think it's still more accurate to say that the dust is visible because of the light. You can't 'see' light itself, you can only see 'things' that reflect/scatter light towards your eye.

[@krasimirronkov17]

@@KhanAcademyIndiaEnglish Why isn't light refracting

[@krasimirronkov17]

@Kaira Jude i hope you understand english well you stupid, I said why isnt light refracting

[@namraaah271]

@@krasimirronkov17 stupid tera baap

[@aaryanjadhav7011]

@@namraaah271 khalass

[@sukiraali2062]

pov your teacher made you watch this vid for an assignment

[@sululus]

not me i’m watching this bc im curious 🤣

[@mylifestyle8709]

Yuppp

[@MadineniSathvika]

I'm watching because l want to learn

[@shubhangitiwari1105]

Wow... Very well explained

[@comet_breeeze]

I discovered this channel too late these experimental videos really make you how it works rather than just statements from texts (most utube just elaborate that) thank you for explaining the reason and logic behind it !

[@happyo4021]

V can use it in 11th properly 🙂👍

[@arpitgupta5518]

i got this recommendation from my teacher

[@jeremygregorios3710]

Me too

[@tortita1840]

me too lol

[@alkaansari965]

Very clearly explained. .. Really wonderful

[@adarshyerneni799]

i wish i could hit the like button a thousand times! so well explained!

[@renalenroluma9722]

Thank you for this very informative video and you really demonstrate it so well.

[@C_yau]

omg thank you so much!! So well explained!

[@papaimondal1159]

Thanks for this awesome explanation with demonstration

[@shivbholeshivbhole1318]

Rakesh sir has told me to see this video and learn but its really easy

[@umachouksey7429]

Thank you Sir. Pretty Clear and nice explaination👍👍😃

[@jiya609]

best video about tyndall effect! cleared all my doubts. VERY WELL DONE!

[@shaikthasneem5220]

Awesome explanation sir..... thanks so much...it really helped

[@olimpiacatalinasalinasgarc7212]

Thank you so much for sharing. This is a great demonstration, and the explanation is clear and easy to follow. I'll be sharing with my students :)

[@supermantorr3022]

Thank you so so so so much, I have a test coming up and this clears EVERYTHING

[@AdelinaPinheiro]

Excellent explanation! Thank you!

[@Green3rd]

Great explanation

[@kaustubhgupta46]

Great video

[@damienchiang8801]

Solid vid!

[@dr.craftmind3901]

Very good explanation..

[@User88432]

Thank u sir , really helpful

[@adarshnaik9483]

My teacher recommended me this video

[@suprabhatkumarghosh5713]

same here

[@akhshitabhat3883]

Gr8 explanation

[@kandyajith]

Excellent explanation

[@hajraifti2579]

Good job... Hard topic for students but is explained well in this video

[@RandomGuy-gv7ur]

Gaurav Sir, thanks for sharing link.

[@anandjoshua4711]

awesome video

[@Hino_55]

Sir Mahesh I have a question: If light is scattering, why is it only confined to a single beam? Is it because the repetitive reflection/scatter of light from one particle to another causes the intensity of light to diminish as it hits more and more particles? So the beam of light is where reflection of light is still intense/strong?

[@shreyasinha1173]

I'm guessing here but the source of light here (a torch) produces a single beam so only the colloidal particles along that beam get hit by light.

[@Hino_55]

@@shreyasinha1173 I can see why you think that, but the question still stands, if you look at the colloidal particles at the edge of the beam, they are still hit by light isn't it? Still got me thinking, if they scatter light just so poorly that to our naked eyes, we can't see much of it hence we only perceive a strong confined beam. Anyways, thanks for your insight Shreya 😇

[@riajulchowdhury4218]

When light hits colloid particles a portion of it is absorbed some reflected So it is possible . I guess that the intensity of light goes down from particle to particle

[@Hino_55]

@@riajulchowdhury4218 I see it makes sense to think of it that way. Thankyou sir Riajul for your insight! 😇

[@Lennon959]

Do intensity of light got decreases as light goes to farther a particle by conservation of energy

[@Krishnaaaa13]

Nice u save my life

[@ayushmaan7403]

Thanks 💜

[@artificialintelligence2653]

Well explained

[@dell7277]

What if we use pure milk in this experimental? What will be the result?

[@antostark7713]

Thanks a lot

[@grinfacelaxu]

Nice!

[@Ash-mr4rh]

Formation?

[@IcY200]

to everyone crying about his accent it could be that hes born in a predominantly english speaking country so naturally his accent matched how the people around him spoke (thats how accents work)

[@imagineifyouuh]

thank you :)

[@nosferatu5500]

Acutally you should say something about the polarization

[@shyamchauhan2707]

Yes I got this from my teacher

[@sumanrao1845]

Awesome

[@truemusic3064]

Please upload class 11 videos sir!!💗💗

[@canureten5521]

Where are you from?

[@neerutheasphlatracer9804]

I would really liked to do these experiments in my home

[@randerson5172]

What program did you use to make this? I mean, with the writing on top of the video frames etc?

[@aamirsohail991]

Probebly minecraft world edit

[@attackaffection5444]

@@aamirsohail991 what...

[@jollyboyyx]

@@aamirsohail991 lol

[@avaneeshmenon4098]

Gr8 Video sir. All of the doubts cleared. Thanks a lot!! I just had one doubt. Isn't the size of colloid particles varying between 1-100nm? Bcoz u said 1-1000nm. Just wanted to confirm 😊😊

[@nidhimeda3899]

Sir mentioned that the numbers are not exact values but just rough values that he assumed. (7:31)

[@rohithpeddi]

btw NCERT mentions 1-1000nm only..so remember this only

[@jaseelahabeeb8875]

👍👍

[@niranjan7457]

Sir at 00:40, In out textbooks it is given that there is something called "Opalescence" which gets shown. What is the meaning of this term? Please clarify sir

[@kiranbhat4902]

Makes sir does true solution not scatter light....???(as given in class 9 text book

[@user-xs6bl8cx9e]

No, it doesn't

[@ujjwaLoL]

It does but since their particle size is too small the scattering is insignificant or they don't scatter larger wavelengths visible to us which is why we can't see this effect in true solutions

[@alanabraham9389]

👍🏼

[@omsahu6286]

Fun fact :~ your teacher asked you to watch this

[@kuldeepchaurasiya2529]

Sir theory

[@wirebrushproductions1001]

This is only partly correct. Tyndall Effect scattering is wavelength-dependent. Short wavelenths (blue) are scattered more strongly that long (red). Simply showing scattering by colloids does not identify it as Tyndall scattering, and using a single-wavelength source like a laser igmores the important part of the effect.

[@KhanAcademyIndiaEnglish]

What you are referring to is called Rayleigh scattering.

[@wirebrushproductions1001]

@@KhanAcademyIndiaEnglish NO. IT. ISN'T. Rayleigh scattering occurs for particle sizes much less than the wavelength of light. Call it less than ~20%. Tyndall effect occurs for particles in the range of 20% to 100%. Tyndall specifically noted the changes in apparent color for the media he observed. Scattering for particles much larger than a wavelength is called Mie scattering, and is not wavelength-dependent.

[@wirebrushproductions1001]

@@KhanAcademyIndiaEnglish If you go, for instance, to the Wikipedia page, you'll see Rayleigh scattering defined as "the predominantly elastic scattering of light or other electromagnetic radiation by particles much smaller than the wavelength of the radiation."

[@DeepakVerma-ix9fk]

System

[@alaskakharel7723]

No offence. Your accent sounds quite fake but this video was very helpful to me so, thankyou!!

[@lilsoap8301]

school bad

[@bhawikajain7566]

Ur explanations are amazing but the only thing I didn't like was the horrible fake english accent you use, please just speak in ur real accent. (Not a hate comment, just saying what I thought)

[@AmandeepSingh-bj9dm]

Fake accent 🤣🤣🤣🤣🤣🤣 50 rs kato iss batt pe

[@rtrvarghese8654]

Accent 🤮

[@guhansaravanan8437]

Attitude 🤮

[@lisaclament7153]

🤢

[@iamgreyiamgreen]

The accent Sounds pretty decent and nice to me, not to mention really understandable and clear

[@pianistarnab4749]

What's wrong with the accent... It's perfect