Liquid Crystals | Intro & Theory

Experiment 10 in CHEM 1211K is titled “Liquid Crystals.” This video introduces polarized light and discusses how nematic and chiral nematic liquid crystals interact with light. You’ll observe these phenomena in the laboratory.

[@alvinleeeee]

It's very sad that this video ends before it goes into chiral liquid crystal. Would love to learn more about how circularly polarized light react when passing through a layer of chiral liquid crystal.

[@oliversmith2]

Very strange not many views on this video. It's the only one related to my search...
liquid crystal polarisation North Pole.
Good use of tags, this is exactly what I wanted.

[@Astronutt122]

Look out rih

[@Astronutt122]

Hi

[@AsiaDanceScene]

Really liked your explanation of pitch, helped me understand that nicely.

[@aion2177]

Thanks for the video. I wanted to understand more about why is plane polarized light partially rotated and by how much based on this why... as opposed to just stating that indeed plane polarized light rotates while passing trough the crystal. Also a bigger picture where 8+ of this molecules are shown connecting with each other assembling that we call the crystal - where exactly are the molecular bonds - would be nice as opposed to just seeing one of this molecules and trying to imagine how the heck they bond to each other. Not because is important as knowledge for an intro video - but to remove the voodoo magic out of such crystals. But overall very good explanation :) Thanks a lot.

[@simrannahar8262]

Very well explained, thanks!

[@habtamusium8646]

thank you ! you imparted me many lesson to many years knowledge gap

[@iyadindia862]

May I know, in labs, how the order parameters of liquid crystals are found?

[@theoneprince777]

Very interesting

[@mohammedviso2269]

Great video .....Thanks

[@user-pi2nl6iu2n]

Good video

[@Skunkhunt_42]

Interesting, danks!

[@natethegreat5470]

How dangerous is the "fluid" inside LCDs? Can it leak out of the monitor by any chance

[@Astronutt122]

Do you mean web fluid

[@edwincasco8250]

Hi Michael, is it possible for you to provide what the plot of wavelength vs temp looks like or share a reference in literature where I can study this further? Thanks!

[@Anthony-bz2xs]

hey mr evans, what is that program you are using?

[@mevansthechemist]

I use ScreenFlow to record and DoodleDesk for drawings on this video. For videos where I draw on PowerPoint slides, I use Deskscribble.

[@rodneymoyo6279]

Hie, if I were to synthesize the liquid crystals in the lab, the cholesteric liquid crystals, which starting material would I need

[@Anthony-bz2xs]

you would need cholesterol.... thats why its called cholesteric LC

[@lolzomgz1337]

7:03 Right, but what's the actual equation? If i wanted to get a numerical value for wavelength, how would I do it?