How 3D holograms work

[@EugeneKhutoryansky]

It is a very good introduction to the topic, though of course, a much longer video would be required to fully explain how the diffraction properties of waves ends up producing a 3D image that rotates in the correct way when we change angle we look at it from.

[@physicsgirl]

+Eugene Khutoryansky That is true. There is only so much you can do with a 4 minute video!

[@Kram1032]

+Physics Girl Maybe a series of 4min videos? :D

[@sohamshah1806]

God. Love you both guys . Physcis Girl and Eugene .Thx and keep making videos

[@rodrigoappendino]

+Eugene Khutoryansky It's a work for the Eugenius of physics and animation.

[@Seegalgalguntijak]

+Physics Girl I'd like to see a series of 4min videos as well. Or maybe a 8min video (or a few 8min videos), depending on what's best to really explain this!

[@amukeen]

Hello Physics Girl, we in the holography community are so happy you made this video! There are so many false claims nowadays about what a hologram is. It´s just perfect to see somebody actually knows what it´s about!

[@Ratzfourtyfour]

Conclusion: It's kinda hard to explain.

[@just_a_human.8190]

Also to understand

[@DstnLaPres]

And understand... As are most topics involving Quantum Mechanics, QFT, QCD, Theoretical Physics, etc...The reason being that they are counterintuitive. They fly in the face of everything most of us were taught from elementary thru Highschool & in some cases college...

[@krishnachoubey8648]

3b1b made a video on it just now!

[@Durrdalus]

"Hey, mind coming over and stomp around my yard a bit while I film it?"

[@Durrdalus]

+3ATIVE I blame the lack of fresh coffee in my internal containers.

[@TheBobby416]

@@antrygrevok6440 for real

[@bowenarrows2k]

I find the concept of a holographic film retaining the full image when cut very interesting.

[@1ramonbarrio]

The best video I found to explain hollograms quicly but not too superficial

[@MrRoboskippy]

I still don't get how they work.

[@salabs4222]

Which by my estimates should put out two wavelengths that are fluctuating in and out of each other bouncing in and out of each other which is the infinity machine. ( THE LIGHT ACCELERATOR ) And the batteries slash generators are made of super conducting crystal diamond infused with gold and superconducting material formed in superconducting material and electricity so would you grow it it's charging itself

[@salabs4222]

And those are also going on my laser or whatever you want to call it

[@salabs4222]

See the ion engine works like this the at the Planck scale with everything Flows at its base waves okay now this machine I'm building build these waves from the bass waves just like

[@stevewilson4321]

It records the phase of the wave, So you playback a recording of a coherent standing wave giving it depth that a photograph wouldnt have... Better?

[@salabs4222]

@@stevewilson4321 Yes u r right

[@dazwannawzad9272]

As a kid in the 80's I always wondered how the holograms for stickers like Lisa Frank and on toy lines like the Visionaries & Supernaturals were created, they appeared to be sculptures photographed in 3D. Thank you for a brief look into the creation of those images and if you don't know about the figures I am referring to, check them out, esp. the Visionaries line, some amazingly articulated 1980's nostalgia right there !!!

[@legrandgougoulilumine6940]

I'm really amazed by holograms.. when you look at them up close, it's like there's a little 3D world in there. So cool !

[@grant50]

Wow! Right over my head!

[@SamyasaSwi]

same

[@MindLaboratory]

Could you please post the email you must have sent to your friends asking them to come over and walk randomly around the backyard?

[@physicsgirl]

+MindLaboratory hahaha It went something along the lines of "I’m filming a video that I need to get a shot of a “crowd" for. You don’t have to do much except walk around and freeze. I’ll supply the cookies, drinks, food, whatever your heart desires!" I'm amazed they showed up. :)

[@KarthikeyanRajaseker]

+Physics Girl They simply couldnt stop laughing ! :D

[@Maehlice]

+Physics Girl Free food? Sign me up for your next yard-stomping party. :D

[@ireallyreallyhategoogle]

+Physics Girl Free food and drinks works every time.

[@frankclausen2506]

First i's a nice prisetation thanks. To understand how we can see the entire image/picture in bouth in the entire hologram as-well as in eahc fragment of the hologram we must undrestant that a hologram is not a picture but an Optical phenominan/media and in this case work's like a window. Lets say if we cover at entire window whit a black sheet of paper with a hole in somewhere and if we take a look through this hole no matter where it is plased, we'll find that we'll see the whole room/landscape/image only our veawing angle is slithly deferint depending where the hole is plased in the paper, again as we remove the entire paper we'll naturaly still see the entire room/landscape/image. Erros: Erro in this prisentation: be aveair its chrutioul that both the reference and objeckt beam is coherent to make a inteferince pattern/hologram. Coretion: The deference is not about coherentce but the vawe-front/vawe-pattern. the referance wave pattern is regular where the opject pattern is destorted/formed by the shape of the opject theo still coherent whit the reference beam/pattern when they mede and form the inteference pattern on the film and are recorted. Thats why we carefuly messoure the lenghts of all our optical rails/trains when recort a hologram. Spelling Erros: Pardon my many lag of propper english spelling skills :-)

[@odog900]

Because so many people think they are holograms, I always refer to peppers ghost as "holograms" with full air quotes. Most of my high school friends hate physics and don't want another long winded explanation from me. But I LOVE holograms and optics. I want to minor in physics and I think I could do a lot of research there.

[@robertford4678]

Go for it

[@peristanom]

Finally, someone able to patiently explain holograms to a non-scientist like me! Thank you!

[@whatever56567]

I just found this video and am really impressed with the quality that this was in 2015.

[@DrDrift-rl6cc]

Thanks! You managed to create a really understandable explanaiton of how a hologram works without sacrificing accuracy! Much love.

[@philipstuckey4922]

this chanel is one of the best physics channels on KZbin, watch out Derek , there's a new channel in town!

[@theoldguy2172]

Instruction for understanding the science of things by someone who knows how to relate to those who are not already saturated with scientific information ...it's continually interesting, amazing and wonderful.

[@PeteCorp]

Finally a good explanation. Thank you.

[@NickMoore]

Great explanation, the backyard-bullet time was cool too.

[@danielordonez7357]

I find the way you express your curiosity of the world veery attractive, great work!

[@salabs4222]

You people are on my level you think the way I do and you have passion you all do

[@Lettuce-and-Tomatoes]

Great explanation! I’ve always wondered about how holograms are made.

[@savvysoars]

Loved the way of explanation. All doubts cleared 🙌🏻🙌🏻

[@abhishekdebnath2691]

So....good. First time I understand about Hologram so clearly. Thanks to physics girl.

[@sumasu4496]

Reminds me of the pictures we'd draw in school by folding a paper in zigzag so when the paper is open the image would change depending on where you looked at it from.

[@shaterproofblosm]

I found your channel yesterday morning and watched a whole bunch, really enjoying it with this mornings coffee :3 Your vibe is solid and the information is thorough. Please make as many more as you can ;p this is as good as smarter everyday ;p for full really like over 8000.

[@xteuk]

Thanks to you I finally understood (really) how hologram works. I was so confused about them when I was a kid. I just had this "Eureka" flash !

[@Disktoaster]

How cool that you can cut a holographic film apart and still see the whole object. Like what a cool idea for a family gathering- take a big hologram, show it off, and cut it into as many pieces as there are people in front of everyone. You'd have to pass them out and tell everyone to look closely before they'd get it.

[@rahulbelwal2989]

Brilliant idea

[@SenpaiSan]

I am honestly saying...its one of my favorite physics channel

[@Mikearice1]

Once went to a hologram museum in Indiana (don't think it'a there anymore), and they had a hologram of Ronald Reagan. Those things are awesome but creepy looking. They're not just 3 dimensional. You can see all kinds of detail that just isn't there on a regular photograph: moisture on the eyes, light glinting off the hair on the skin. Of course there's no way to show this in a video, but it's pretty striking when you see them in person.

[@sharmadronamraju8224]

Thank you, Physics girl! this is my first lesson in Holography!

[@everything_strength]

Very Inspiring video to watch for my graduate level photonics class!

[@clearwavepro100]

Thank you so much for stating the fact that for holograms like this; for each division of the whole, that the whole is contained within each division. This fact is one of the rarest things demonstrable, about some very special things, such as a single member of a species still has all the information about that species. Or a single instance of an electron, still has all the properties of all electrons. Possibly there is such a relationship with many other intangible relationships that may or do exist all through the universe....and teaching about things like this really does inspire one to wonder about all the other types which exist in this, or similar beautiful ways. Thank you much! Thank you for sharing this, with us!

[@ballooniecat]

Thanks for this video - in addition to a great source of info on holograms, you've answered a question that's been bugging me for some time, namely, why certain sci-fi machines are said to be holographic if you can cut a piece off the machine and have that piece function just like a tiny copy of the whole machine. This always puzzled me, but now I know, so thanks.

[@TimWeitzel630]

Excellent as always! A good friend's father did some research with Hologram's at U Iowa.

[@frollard]

Very cool - I'd still like to know where front-lit holograms get their coherent laser backlight.

[@porkrinds9572]

Weak. hand-drawn teaching elements with an abundant scarcity in technical detail. Great for 3rd graders. So much for physics, girl. All the same, cheers for the effort.

[@bilhelm000]

So does a finished hologram require a laser for the 3D image to be visible? Or can you see it in normal light?

[@NaturallySelected]

I still don't get it.

[@BYMYSYD]

Great video. But it needs a minor correction: Just because each point on the holographic film contains information about the complete object, does not mean when cutting a piece from the film, you still can reconstruct the object. It just means that each point on the film contains information in the form of an amplitude that is derived from the sum of all amplitudes of light of various phase being reflected off all points of the object.

[@TheJonathankang]

Lucidly explained, thank you very much.

[@jonnyreverb]

Those are your friends walking around in your yard for the light, aren't they?... I love that! It's so much more personal than you expect from a physics demo.

[@gargoyle7863]

Drove me crazy not to know how the one in my passport works. Thanks for the explanation!

[@mastersubhadeep]

How (and why) would anyone ever (in their right minds) dislike this video!!

[@jonnyreverb]

Love this! The more I see it; the more I love it.

[@Meego_007]

good to see her friends helping her out. i wish i had friends.

[@lesliev9688]

BRILLIANT! Thank you.

[@JonnysGameChannel]

Holograms are very confusing, but thanks to this video I understand it much better.

[@zeekjones1]

The object beam is essentially a 2d grid of the object, similar to the 1d line around a music record.

[@shanmukhag2349]

great video. Though I didn't learned much about hologram, I am much excited about it.

[@rchydrozz751]

Nothing more than a movie projected onto a screen from different angles. No big deal.

[@dodoahmed3121]

Thanks helped me a lot!

[@KillraStealer2]

I really enjoy your explanations of things keep them coming :)

[@ToiletDuckify]

Pretty clever, and makes sense now. Thanks

[@Maehlice]

I was slowly getting lost until "C-A=B". I'm sure somebody'll say it's an oversimplification, but I think that's exactly what I needed. Keep up the great work! (I really hope these more frequent videos become a regular schedule.)

[@IsabellaFlames2023]

It’s the ultimate way to take a photo

[@dm_nimbus]

Would you be able to use multiple wavelengths of lasers to combine into a multicolored image?

[@DForce26]

I thought I heard that's not possible yet

[@amith2176]

+James Craver I think the interference pattern would be messed up if you use multiple wavelengths

[@GraveUypo]

+Amit H use different surfaces for each color and then combine the output digitally. you can display it on a regular 3D screen with motion tracking. it's a bit of a cheat, but possible nevertheless. maybe you could somehow use a layered surface to do it without cheating, but it would be hard to do it for non-static scenes.

+James Craver Yes you can! You can also do this at home with Holograms kits (around 200$). 3 different lasers of 3 different color are used, in a 3 steps exposure on the same film.

[@HolosgrammaDIY]

+Plaît Liste Exact. Search for "Litiholo Kit".

[@Valery_B]

very good as always, I'm french and I like watching your videos !

[@TinaLouise73]

This is very informative and interesting! Love ur easy to understand and for a laymen person like myself this explains it in a way that ppl can easily understand! 👏👏

[@manny9639]

Very instructional! Brilliant!

[@ViolettaSachra]

Okay, I think I'll have to watch that again :'D but I was also very distracted by the images. I still can't believe that this is possible! It seems so futuristic ^^

[@isethoriginal]

how exactly does it work that you can see the entire image in a small fragment of the entire picture AND the entire picture on the entire picture?

[@jnnnnn]

+isethoriginal The small fragment would show you the whole scene but it would be very blurry. The whole holographic film shows the same scene but much more clearly.

[@Lembdadelta]

Because the interference pattern on the holographic film spreads out the information on it with no correspondence to space. In other terms, if you take a single ray of light, its "presence" will alter the whole interference pattern, therefore each single piece of holographic film holds information about all the light rays reflected by the object.

[@DeityDeconstruction]

Thanks for including the link to Pepper's Ghost tutorial, I've always wanted to know how it's done! I couldn't replicate the result with a flashlight, bucket, two mirrors and a brick of cheese like Old Man Smitheers used when he was masquerading as a ghost haunting the fireworks factory. Darn you Scooby Doo and your bad science!

[@gonzesse1437]

This was explained very nicely! Thank you

[@mrautistic2580]

One of your best!

[@eashwarraaj7996]

very Usefull video and presentation was so good

[@livestrongdiehard12]

This was a great explanation ! Certainly cleared up the concept in my head. :D

[@GOODBOY-vt1cf]

thank you so much

[@rahulbelwal2989]

Very good

[@aungzawmin812]

Great job man

[@chercheurdesons4457]

There's also Dr Nozman (French channel) who teach how to make a hologramm with just a CD box and a phone ! ;)

[@legrandgougoulilumine6940]

It ain't the same. It's not a picture and you have to keep to phone on.

[@grapefru]

Unfortunately this makes no sense to someone who doesn't have a solid understanding of light physics lol

[@bobnavonvictorsteyn9017]

Grapefruit7 It does make sense. I’m a high school student, and I understood everything

[@grapefru]

@@bobnavonvictorsteyn9017 thats usually covered in high school physics, so yeah that makes sense haha

[@nextdoorparty602]

Grapefruit7 not really more like all schools cover this and I’m in middle school

[@esgow_]

@@nextdoorparty602 Same...

[@radovan2279]

I'm a physics major and, though I get the science behind it, still find it hard to comprehend the technicalities of making a hologram

[@Poodleinacan]

Imagine making a holographic image to be used on a billboard.

[@ModMINI]

Just found your channel and I'm loving it - where have you been my whole KZbin life, Physics Girl? :-)

[@rahulbelwal2989]

Very nice

[@mustafasayedali671]

thank you very much .. you've got a new subscriber ..but we also need more details about this particular topic please.

[@pratyushv96]

Amazing explanation! pretty cool

[@HeavyboxesDIYMaster]

Thank you for explaining!

[@stan.rarick8556]

When you reduce the area of the film (by cutting, e.g.) you DO lose information. Not the 3D effect, but the part of the image you would have seen through the portion which has been removed.

[@kulderij]

You have such great friends! So funny how they pretended to be lightwaves!!!! #keepupthegoodwork

[@Holobrine]

If you had a filter that only let through one wavelength of light, could that work to take a hologram in broad daylight, as long as you know the wavelength for the filter? Or better, put the filter behind the holographic film so you can hold it in your hand!

[@Gabriel-cc2vb]

great job !

[@dorijan21]

Thank you very much. This is great video.

[@adrianagNeuroFit]

First... Let me tell you that you ARE FREAKING AWESOME, and this EASILY can become one of Favorite Channels💪⭐. With that out of the way, do you have a video that explains the quantum field and quantum physics... Thank you!!💜😊

[@perihelion7798]

Image of Tupak was NOT a hologram. It was a projection technique used in the 19th century. Primitive, but effective.

[@cernejr]

I would like to see a comparison of hologram vs. Lippmann photo.

[@danielf950]

Well, fu***ng thank you! At last someone who explains what is a hologram in a comprehensible way for regular people.

[@TheCanadienMickeyMouse]

i wished we could make them digital for modern printing

[@garethdean6382]

What is the limit to the 'piece has information on the whole'? There must be a reduction in information when you take a piece, which suggests redundancy. And you can't keep cutting smaller pieces, eventually you'd reach the wavelength of the light used. When does the image start to break down and how?

[@psycheboy05]

You are a beauty with brains. love you and your videos. :)

[@1227bigj]

Cool stuff!!

[@jabradford32]

The object beam is absolutely still coherent. Both beams must be coherent (that is they have deterministic phase relationship with each other) to be able to produce an interference pattern on the holographic film. The beam reflecting off of the object is extremely complex, but it is coherent with respect to the reference beam.

[@physics_and_discovery]

Can I ask something? To make a hologram, do you need some special film, or just a photographic film works?

[@piyushsingh4071]

Thank you so much ma'am ☺️

[@Holobrine]

What if you took one of those old cameras that records separate film channels for each color, stuck some holographic film in there, and illuminated the subject with three lasers? The projector would be the camera in reverse. Then you have a full color hologram.

[@tarabearchan5097]

was I the only one thinking of vocaloid concerts during this?

[@Jacqthepossposs]

yes

[@ngyvocaloid6018]

look at my profile picture...

[@fandyus4125]

Weebs, weebs everywhere.

[@agr8trip]

I feel like the real rub is actually in how the holographic film works. You cannot record a holographic image with regular film, however somehow this special magic holographic material somehow works. I never liked explanations like this video, since it skips over this.

[@lectorbercrum7332]

good job

[@JohnMichaelStrubhart2022]

Excellent introduction to holograms! It occurred to me while watching that the analogy of people all walking the same speed, but with different stride lengths can be very useful in explaining a lot of light wave phenomena! Way to go, Physics Girl!