Lec 15 | MIT 3.091 Introduction to Solid State Chemistry

[Donsknotts]

it's MIT yet it can't escape the 280p plague, lol

[NevadaRevava339]

na wohne in leipzig

[pacrox2]

39:00 why would you skip this class

[KhawajaSlaDe]

My Chemistry Teacher Sucks. My physics teacher is okkk..

this guy is AWESOME.

Singapore!

[agapitoflores001]

Wow! This is a very intellectual video.

[bumb9]

I wish there'd be teachers like him in Spanish's universities.

[lambergino]

I HATE HOW it says "See Lecture Notes for Details" .... wasn't MIT's whole pointof putting these videos on YouTube to make "education access free to the world" ?????

Wow...

[ravnitsuri1]

@lambergino man chill it is available at the ocw.mit.edu

[killermonster555]

Ok something doesn't add up.

1) Glass isn't transparent? I've seen glass. This is a lie.

2) i) Metals have no band gap -+ opaque

2) ii) Metallic glass is transparent

What the heck is going on here? :0

[PlethoraXofXThoughts]

@killermonster555 He's saying that not all glass is transparent and a more accurate way of describing glass is to say that its molecular structure has no long range order. I think you can observe that too when glass breaks into with shapes don't have any uniform shape to them, just random cut edges. Suggesting no long range order at the atomic scale.

[Kotesu]

@killermonster555 "Glass" in chemist-speak is "amorphous, no-long-term-repeating structure or pattern". It only serves as a moniker for "not a crystal".

Standard window glass that us lay-folk are familiar with is an *amorphous* solid comprised of silicon dioxide, sodium carbonate and a few other goodies. It's specifically designed to be transparent, but it doesn't have to be: eg. put chrome in normal glass and you get something that's completely black.

[kimiiiiiad]

what is the edge lenght for body centered cubic?

I dont know how to find that.

[iamonhomerow]

contain your self. there's hope for all of us.

[tufnaman]

very good lecture, what a great faculty :D

[supercharge09]

thank you sir 

[rags1is1gags]

omg i have this chapter in my +2 :0

[AnnaEvolut]

the content of these lecutes is mighty fine. good explanations. watching this man is an event. he in his suit with his neatless hairstyle, talking about the order of the things in the world, everybody and everything very correct and disciplinated but highly concentrated. so his way is very efficient, but something irritates me about him i cant pinpoint it. well THANK YOU MIT and world wide web! i love to be a student (molecular biology)

[johnmacward]

I agree with those that have problems with "confusing" professors. It seems to me the only criteria for teaching in a lot of cases is pure knowledge, not a skill in imparting that knowledge. And on another topic, lectures are too much like work, they're not like learning. There's a goal at the end - an exam or a project of some imposed kind. There's a hope that it's enough for the student to pick up a partial amount of data.

[shurik323232]

Cool for general introduction, but too fast to make suitable conspect

[Rabelaisiangoose]

This man is a god. A brilliant amalgam of Lenny Bruce, Mr. Rogers & Julia Child.

[Aramakie98]

When he made the joke about 'bad samples' I choked.

[ahmedmasjhasyed]

I am chemistry teacher ,I requested all my chemistry lectures to follow these  lectures.

Prof.S.Masiha.Ahmed.

Pakistan

[amensista91]

This guy is good.

[Nanogrip]

Very good lecture, it is clear enough for everyone to follow and at a good pace.

[raypsi]

I always thought glass is not a solid it's a slow moving liquid. but he's able to pull victory from the jaws of defeat.

[theGUYwho1]

does any1 kno the name of the huge underground facility in europe where there bending light with electromagnetics to break down the atom? it's like a big huge halo underground

[msiligup]

cern

[dhwanitchem]

Its the Hadron Collidor

[fallofadam]

LHC Large Hadron Collider and its at Cern. And its an "atom smasher" they dont use light to break down the atom they accelerate atoms to close to the speed of light and allow them to collide head on. The large amounts of energy in this collsion create particles that are then detected.

lol justs so you know lol

[MusicIsSexxy]

What's the Dr's name? Must be Dr. Amazing, he just flies and grabs your attention. It's just fascinating how he does that. Those 47 minutes or so flew by very quickly. I wonder how he would entertain his close family and friends. Would he be this charming of a professor in Chemistry? Or would he be just a normal guy? Nevertheless, he is very enthusiastic about his MIT superiority over Harvard, his argument is well taken, even if some disagree. The student body depicts outstanding commitment. ...

[bytedildo]

I wish our faculties would have such a good proffesors.

[jradetzky]

@bytedildo it would be a waste with students who write "proffesors" instead of "professors"

[bytedildo]

@jradetzky And even a bigger waste with students who think they are smart if they can recognize a typo. Go back to preschool smarty ;)

[BuddyNovinski]

Donald Sadoway, from the first lecture. We touched on this subject only superficially in my freshman chem class at a commonwealth campus of Penn State in 1975. I last had mineralogy in high school in 1972. Now, Penn State does have such courses at U Park, but I never had time to take them the eight years I was there.

[majortom321]

Fuck school

[Thbueno35]

Bad teacher for a video class...

[mchamp3802]

So glass is not transparent but metallic glass is?

[amcnea]

I think he said metallic glass is NOT transparent, because a metal has no (or a very low) band gap. A material needs a band gap of 3 eV or grater in order to be transparent.

[LiiMuRi]

"This conversation is brought to you by secondary bonding." This guy has a great line in every video.

[BGSoccerMagic]

lovely

[ssnorris1]

fuck school

[thomasliuchapelhill]

Very nice prof