Scattering of light & Tyndall effect 

not me i’m watching this bc im curious 🤣

Yuppp

I'm watching because l want to learn

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.

@@KhanAcademyIndiaEnglish Why isn't light refracting

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

@@krasimirronkov17 stupid tera baap

@@namraaah271 khalass

V can use it in 11th properly 🙂👍

Me too

me too lol

same here

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.

@@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 😇

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

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

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

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

Probebly minecraft world edit

@@aamirsohail991 what...

@@aamirsohail991 lol

No, it doesn't

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

What you are referring to is called Rayleigh scattering.

@@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.

@@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."

Attitude 🤮

🤢

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

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