Polarisation - Sixty Symbols

[dragos7puri]

Is there a way to see the whole uncut video (or videos, not only for this one, but the whole sixtysymbols videos)?

Thanks

[lypse14]

I like all the profs, but this guy is my fave for some reason lol

[sentientagent]

brady, get your head around quantum mechanics, I want to hear the rest!

[cloggy2000]

At 2:34 Very nice big signal" of 4-5 mA

At 3:00 Polarised: "Really big signal" of 6-7 mA - Why is it now BIGGER?

At 4:38 "Lovely big fat signal" of 8 mA

At 6:05... Wouldn't that horizontal part be smaller than the original signal... not bigger.! Especially when probabilty of fotons passing is 1/2....

[soberek]

Finally U all know how your LCD monitor works...

[dsnhira]

Greatly explained about road and river reflation and polar glass activity which I was not aware of. I knew about polar glasses and how it works though but your explanation was awesome and made my brain clear like looking inside pond wearing polar glasses. Thank you.

[StagguhLee]

Physics explained by a playa.

[IhorMe]

6:53 - you meant now it's coming out with an angle 90 degrees to what you're showing, right? =)

[sbergman27]

Once can "understand" polarization, in an abstract sense, in terms of polaroid films turned this way and that. And even in terms of weird quantum effects when the films are at 45 degree angles from each other.

But watching Roger Bowley rotate that oven rack in front of the microwave oven really brings it all home. The transverseness of electromagnetic waves is *real* in a way that it wasn't, quite, before. Kitchens are much underutilized as science laboratories, these days. Yeah. I know. ;-)

[diodamajstor]

i have this foils and i need transparent this foils



[swapnilhitman]

Very very informative... Thank you

[photonman54]

you should change the show to infinitysymbols :b

[Speekerful]

This was highly relevant to my photography interests! Its always good to know the science behind your equipment and how they work.

[12co3dy21]

That cant be a very healthy experiment :P Very informative though

[jeff77789]

hey guys if you take the lenses off of the 3D glasses at the movie theatre then you can actually get the same effect as the very first demonstration

[57dogsbody]

OOOH this guy is SUCH a SEXPOT, more please

[suvingha]

sixtyseconds you rock man....

best videos i have seen in a long time..

[Rpks0323]

Amazing physics... I think I'm getting more and more interested in it now xD

[AssemblerGuy]

Did he mention that probability-based explanation just to pester Brady with a tad of quantum mechanics? :-P

[h1ghv0ltage]

I love sixtysymbols its my favorite channel now

[hifhif123]

I was worried this might turn out to be a nasty april fools joke....;-)

[kyle3420]

The beauty of quantum mechanics at work right there...

[Manoscool45]

WOW simply WOW!!

[martls6]

This really nice teacher has to work on his health before he kiels over, just from doing a lecture.

[HWGuyEG]

Aww, he didn't mention circular polarization, only linear.

[wrtlpfmpf]

Wait a moment, it cannot heat the wire.

The wire is a good conductor, therefore the electric field strength near the wire must be (very close) to 0. However the magnetic field is practically unaffected by the wire, therefore there must be another wave travelling in the other direction cancelling out the original wave at the point of the wire. It gets reflected, not absorbed.

[Hynee]

@wrtlpfmpf An electric field cannot exist inside a conductor. Corollary, current travels on the surface of wires.

Thanks for making me think about this!

[aom9010]

@wrtlpfmpf the magnetic field induces current in the wire and because of the resistance of the wire,the electric field is absorbed and causes some heat in the wire.

[wrtlpfmpf]

@aom9010 You'd need a closed loop for that which is not the case here. If a current would flow it would cause it's own field cancelling out the field. Those are eddy currents, however those are getting stronger with the conductivity. So a superconductor cancels out magnetic fields trying to pass it much more than a piece of metal does.

[axelasdf]

I wonder how many freshmen have considered watching these before they go to their labs.

[GRAHAMAUS]

@kristijanadrian Please desist with your pseudo-intellectual prattlings. Either publish or shut up, or see a therapist... whatever works.

[jackerd12]

Does that microwave thingy-magic harm you in any way? since its microwaves?

[GRAHAMAUS]

@jackerd12 It's only a few milliwatts, not hundreds of watts as in a microwave oven.

[Winnipuhification]

everything cheked brady? ;) very nice guys, thumps up!

[DakaSha]

lol the professor is so happy at the beginning ^^

[Dirtboy101]

I feel like his hands should be doing something along the lines of my microwave dinner in the microwave generator. Why is he unharmed?

[GRAHAMAUS]

@Dirtboy101 Because this apparatus is only a few milliwatts, not hundreds of watts like an oven. Why does a tiny light bulb not harm you when a big one burns your skin when you touch it?

[Dirtboy101]

@GRAHAMAUS haha I know. :)

[lozleigh]

If you’re fortunate enough to own two pairs of polarising glasses, you can see this effect if you put one pair of glasses on and look at your pc monitor, now if you tilt your head 45° you will notice the cancelation, but if you then place the other pair of glasses between you and the monitor you can see the light once again from your monitor! Hurray for science!

[Ghostdog162]

My name is also Brady, so it feels like he's talking to me!

[derickhaywood]

i just got mind fucked

[TheSheepFactory]

:) the basics for cryptography ... :P

[Desmaad]

Would you guys mind updating this to include circular polarization? Thx.

[Vennificus]

"now Brady, this is the bit that really is going to do your head in. Which I'm going to enjoy"

[presbarkeep]

epic

[KableKiB420]

Aww don't worry man. There are a lot of people who think you're cool. :P

[w1ngzer0]

why was there more detected when you turned it at 45? And lol @ the girl comment. =P

[lutchien]

"Now, Brady, this is the bit that really is going to do your head in." I enjoy these videos, and this professor is so delighted over what he's doing. That's the thing about learning, if you don't enjoy it, it doesn't make any sense.

[Thrax005]

This is a very cool video, I really learned what polarization really is, and the professor is totally cool, I couldn't agree more.

[andrewapotheosis]

I want to see the math. It would be cool if you put equations at the end of every video.

[Stripe2848]

I did this in my Physics lesson yesterday! We got it pretty right, though we didn't get the bit with the heat we didn't notice ^.^

[bng44270]

I tried something that I was told to try with my Digital TV. I took my rabbit ear antenna, scrunched the antenna down to it's shortest length, put the antenna's straight out horizontally, and faced, the antenna towards where the signal was originating. I got a decent signal. Since the antenna was horizontal, does that mean that DTV signals (at least US ones) are vertically or horizontally polarized?

[jarvis15]

I disagree - you're quite cool professor. ^_^

Good video. I learned something new.

[Spline909]

I'd like to see the maths!

[Moondye7]

either me !

[RobOnDrugs]

For some reasion, the I found the quantum bit at the end to make the most sence. I dont know why tho, I'm 27, left school at 12, and suffer from mild autisum. NONE OF THIS SHOULD MAKE SENCE TO ME>>>

[Envergure]

That microwave thing is awesome.

I have kept two polaroid filters in my wallet for the last year because they're so awesome.

[Paxmax]

really nice vid, I thought I understood polarization. But that third sheet thrown in at 45deg baffled me.

[seanbrockest]

Now i understand how those 3D glasses work, that are not colored!

[petercourt]

How do polaroid cameras relate to this?

[seanbrockest]

ripped off the name, i think.

[mikeythepussyfag]

they are not related technologies except they are made by the same company.

[Snake0987]

this is awsome

[culwin]

George gets all the girls.

[starkshift]

Prof Bowley! That microwave horn is most certainly not producing one photon at a time. What's being emitted is a classical "coherent state" of light, a coherent superposition of multiple photon occupation numbers, and the polarization effects you observe can be explained by Maxwell's equations.

The quantum picture of things is valid, but largely unnecessary for your demonstration. :)

[benkettle]

what a useless comment. Are you just trying to show how much you know?

[starkshift]

He gave a totally messed up explanation for how polarizers work. In a video about polarizers. That's why I posted my comment. How is that useless?

Are you just trolling?

[benkettle]

He oversimplified it so the average person could understand it, but i think he knows how it works.

[langov3]

Im pretty sure he didnt say one photon at a time. He was trying to explain what happens to 'a photon' when it travels to the polaroid.

I really hate it when people comment on these videos to try and show the world just how amasingly intelligent they are.

I dont want a reply, so dont.

[starkshift]

@langov3

It's a shame we don't always get what we want.

[Bluebuthappy182]

You know the sad thing is that's probably the baby explanation of what's actually happening.

[gayglue]

Yeah, and I bet people barely understood THAT.

[nerdygerdy]

Surprised that device isn't cooking his arm.

[T0mNZ]

Why? its only 6 milliamps, thats very small.

[mV33rs]

ITS MAGIC!!

[solomsolomol]

Wow , I'll never mock any of my friends who buy sunglasses for over £ 500 again !

[kolrabi]

I use polarizing filters for my camera to remove unwanted reflections. The type of filters I use have on the camera side a layer that makes the light circular polarized, which doesn't confuse the built-in light meter as much as linearly polarized light... :)

Wait, what? Can you explain to us, what circular polarization is and how that layer on my filter manages to convert those two kinds of polarization?

[pczaban]

I also would be pleased if someone can answer this. :D

[pin3appel]

MY BRAAAAIIIINNN

[G3org3Master]

IS HUURRRTTTIIIIIIIINGG!

[noyan000]

haha same

[ASKaPHYSICIST]

nice example of everyday quantum physics

[bng44270]

Cool. The science of sunglasses.

Keep the videos coming.

[avecesdeunhilo]

gonna miss the new vids everyday

[holsson85]

We used microscope with polarized lenses while studeing thin sections of rocks. The different rocks consists of different minerals or verious rations of minerals. Each have their own "look" in polarized light meaning that they could be identified, even if they appeard only white,gray or black to the naked eye.

[deathbyninjastar]

this IS magic.

[Anonymouzor]

this is so cool :O

[ArnestyInternational]

very fascinating... But the explanation was going too fast at the end.

[sausage4mash]

yep agree , although I have been on the beer ,so maybe i'll try again tommorow ,but most of that was wooooosh over my head

[Forssa1]

It be really cool if you showed an experiment how to combine two separate laser beams into one, or spit one beam into two with a polarised cube.

[edtronic]

are you guys goig away :(

[DungorCee]

i'm going to be late for work cause you guys upload like 4 vidoes!

[sixtysymbols]

@DungorCee: Sorry about that... today is my last day on the project (for a short time, I hope) so getting everything finished. All done now!

[forglegorktheork]

But don't stop making videos! We all hope to see at least another sixty symbols!

[grnlfe01]

Please don't leave us for long. These are great videos, you've done so much to further the interest of science on you tube you can't stop now.

[kite973]

NOOOOOOO Brady, don't go!