This reminds me of a story my great-aunt told me. Essentially, in their house when she was little, their blinds didn't close properly (they were quite poor), and it accidentally created a camera obscura. Except she doesn't know to call it that, or the physics, just that as a kid she found it amazing, and now eighty-some years later, she still remembers it.
@TommoCarroll6 жыл бұрын
That is actually quite cool! Imagine seeing that as a kid, it would probably have blown my mind! What do you think?
@Mikeztarp6 жыл бұрын
Yeah, I would have run to my parents asking for an explanation, shown my friends... I would have been excited. ^^
@i_notold85006 жыл бұрын
I can relate to your great-aunt. When I was about 5 or 6(I'm 50 now) my parents got a new fridge and I was playing in the giant box in the drive way when, by chance, a camera obscura was created by a staple hole. I thought that was the most incredible thing ever and even sticks with me today.
@RonFloyd6 жыл бұрын
Really cool - my Dad was very into photography, and then astronomy in the '50s. I still have his Speed Graphic, and the 6" reflecting telescope that he built - including grinding the mirror. Those were some awesome times with my Dad (I'm 72 now - LOL).
@BlackEpyon6 жыл бұрын
I remember finding a VHS rip on KZbin somewhere an instruction course on how to build your own Dobsonian telescope (might have been by Dobson himself, I don't remember), including grinding the mirrors (they were 12"). That looked like something fun to try.
@RonFloyd6 жыл бұрын
Oh yeah. So cool grinding, testing, and polishing a parabolic mirror. He did send it off to have it aluminized though. He built a machine to grind a 12" mirror, and did some test runs to iron out the details. Sadly, he died before he actually ground the final mirror though. Life got in my way, and I never did either. The build deteriorated over the years (much of it was plywood).
@BlackEpyon6 жыл бұрын
Nice thing though, is that as long as the mirrors aren't scratched, you can easily rebuild it. Plywood is cheap, and if you're grinding your own mirrors, you've probably got some handyman skills to work with plywood.
@israelRaizer6 жыл бұрын
Hi, Ron! I just wanted to let you know that I really liked reading that short story about you and your dad. There's just something about it that got into me and I think it made my day! I hope you're doing fine wherever you are...
@RonFloyd6 жыл бұрын
Thanks +Israel Raizer Cruvinel! Doing well here in Oklahoma. -)
@lazyperfectionist16 жыл бұрын
Ah. A camera obscura. _That's_ what it's called. Yeah. Years ago, I was working the night shift, which meant sleeping during the day. This requires a dark, daytime bedroom which was not accomplished by the venetian blind my bedroom window had, so I put a cardboard sheet in the window as well. But there was a small rectangle of it missing, and I spent a lot of time lying there, watching the world outside the window play out on my wall, upside down.
@piranha0310915 жыл бұрын
Somehow, your username fits perfectly...
@sharonsolana5 жыл бұрын
Great parallel story! Thanks, I'm still trying to fully understand why and how this happens!
@mythicalmonke88956 жыл бұрын
3:07 It looks like the truck was transparent and could see through it
@victherocker6 жыл бұрын
That's what I thought this video was going to be about
@sulaimonmaestro24366 жыл бұрын
Yeah, like some Military Invisibility Cloak was in use.. or maybe From Hogwarts irdk...
@TommoCarroll6 жыл бұрын
Yeah that was pretty trippy to think about! But the question is: was this _even_ more cool?
@909sickle4 жыл бұрын
The colored string / cardboard demonstration was genius. I love it when something is explained in a way that forces you to understand no matter what.
@housevil22 жыл бұрын
I first learned about the camera obscura as a child in the early 1980s from a show called 3, 2, 1, Contact. The main characters were abducted and trapped in the back of a van and used a hole in the van as a camera obscura in order to figure out where they were. It was a delight seeing you use another van as a camera obscura in this video. Thank you.
@Zurar6 жыл бұрын
ROFL! The little kid asking about the science. It's nearly identical to the story my parents tell me of when I was little (apparently too little to remember first-hand). Anyway, as the story goes, we were traveling to Wisconsin with my grandparents, and my grandpa must have told me that we'd have so much fun when we got to Wisconsin because of all the things we were going to do there. Then, on the drive there, someone apparently saw the "Welcome to Wisconsin" sign and said something along the lines of "We just crossed into Wisconsin", to which I promptly turned to my grandpa and asked "Grandpa, are we having fun yet?".
@NickRoman6 жыл бұрын
Classic. It sounds like you're being very clever making a sarcastic joke, but you were being serious. Maybe that makes it even funnier.
@ThatWarioGiant6 жыл бұрын
“When are we gonna do the science?”
@fsmoura6 жыл бұрын
You can tell the little girl isn't having none of this claptrap! If it ain't peer-reviewed, or at least a pre-print, she isn't putting up with it! 😂 😂 😂
@FelipeFigueroaG6 жыл бұрын
I mean, that's gooing to be put on a PG t-shirt, right?
@breannraniola13356 жыл бұрын
I made and ordered her a tshirt with that on it... :)
@georgetrapp66666 жыл бұрын
😭
@nataliaray73155 жыл бұрын
My brother has asked me that 10 minutes after the science started
@connorgoosen24686 жыл бұрын
That rainbow graphic explaining the pin hole allowed me to finally understand this! Another brilliant video :)
@TomGrubbe6 жыл бұрын
I'd like to see this again with an adjustable aperture so you can see the effect of the hole changing size. Really interesting and fun!
@ExcludedLayman6 жыл бұрын
What I like about the tree-eclipse thing is that it retroactively makes something mundane into something cool: Trees don't know how to change the positions of their leaves just to make their shadows prettier during eclipses, the images of the sun were always there. It's a lot like how nobody ever looks at something in a mirror by flipping it vertically.
@cduemo6 жыл бұрын
Last partial solar eclipse I realized I had nothing to view it with only a half hour before it started. A few minutes work with cardboard and white paper and voila, a camera obscura. Worked perfectly.
@Angelsilhouette6 жыл бұрын
They did almost this exact thing in "The Bloodhound Gang" mini show on "3 2 1 Contact" when I was a little kid. They were kidnapped and trapped in the back of a moving van and were able to do tell exactly where they were being taken by using the camera obscura technique.
@helloimnisha6 жыл бұрын
The way you explained the upside down projection is something even a 5 yr old can understand.. easy and intiutive❤️
@neurotransmissions6 жыл бұрын
Awesome experiment! Such a fun idea. Plus any video that includes Dan makes it that much better. :P
@TommoCarroll6 жыл бұрын
Agreed with all of this! I really want the opportunity to try it myself, looks like a great way to spend a day aha!
@subhoghosal76 жыл бұрын
Awesome. I am thinking to share it with some of school children who read this in book but never observed it so well.
@jasonharrison256 жыл бұрын
I remember once at school, one of the bathrooms had its lock broken off and there was a hole left. Before it got fixed we discovered the same effect when the sun was in the right place during the day. It projected the trees and a nearby building on the wall. Was quite cool to see
@Prof-Hafner6 жыл бұрын
Huygens-Fresnel wavelets with colored yarn - pure genius!!
@aspiringcloudexpert51276 жыл бұрын
1:26 Dianna's heart melts.
@davidpotter65646 жыл бұрын
As a near sighted person you just totally blew my mind with that looking between my fingers thing! It works! I'm not seeing a pin sharp image but it's a lot sharper than without my glasses. I guess that's why squinting works a bit too.
@jcoronet20006 жыл бұрын
when i was a kid we made pin-hole projectors using oatmeal cans. which gave us a panoramic image because we taped the film to the round inside
@Pianoscript5 жыл бұрын
I experienced this in high school in a classroom dedicated to movie watching ( in the 60s before video); there was this pierced blind that was in effect a camera obscura projecting upside down an image of the people walking about. Your project is nice.
@BubbaYoga6 жыл бұрын
Fantastic idea and execution.
@SciencewithKatie6 жыл бұрын
Aww how cute is she! 👧🏼 Scientist in the making!
@davidscott59036 жыл бұрын
Physics Girl 2.0
@ChozoSR3886 жыл бұрын
She's just the most adorable little thing :) On a side note, I often wonder why kids are cuter when they lose their top front teeth. It's just like, *kid loses two front teeth* *cuteness intensifies*
@dontask89796 жыл бұрын
To want to share it with people in the park. Someone has a new "Dream"
@Seegalgalguntijak6 жыл бұрын
ChozoSR388 It may have to do with what these teeth were used for back in the day before you could call us humans sentient lifeforms, something in our DNA may have remained that sees front teeth as threatening, and if they're gone, a harmless little being looks even more vulnerable since it has lost the ability to defend itself (or at least that's what the ancient programming of our DNA makes of it). That's just pure speculation though, I'm sure someone has made a science video about it. Or if not, they definitely should! ;)
@917228546 жыл бұрын
The purpose of losing top front teeth is so to create the pinhole camera effect for the eyeball inside their mouth ;)
@t63a7005 жыл бұрын
This was done by that cast of a TV show that I used to watch. The television show was 321 Contact, It was a afternoon TV program and all things science on a public broadcast station. It was a great show, wish they had something like that today.
@michaelovitch5 жыл бұрын
Have you tried with a magnifying glass in the hole ,and moving the "screen"
@joetarraf65116 жыл бұрын
So simple yet so COOL !
@Alan-lb6gw6 жыл бұрын
The moving U-Haul obscura video is so cool
@richardturietta94556 жыл бұрын
EXCELLENT description of the size of hole effect! I have a physics degree with an emphasis in optics, and I used to work for a NSF project teaching science to kids, so I LOVE LOVE LOVE your comments in this (and all of!) your videos. Keep up the awesome work, Diana! Keep Physicsing! :-)
@___..Blade..___6 жыл бұрын
1:30 as she said it's dark, all of the sudden, electricity went off at my home.....lol..😂✌️
@AndreasA.S.6 жыл бұрын
as a kid, a group of us traveled in the back of a uhaul back in the 80's, and there was a perfect hole in the door that created this effect. we learned to read traffic signs backwards, we knew exactly where we were for 12 hours of science. we had a CB back there and would chat with trucks behind us. a lot of memories of this trip, and i have talked to a guest about this recently while discussing my security camera setup.
@Shivamkhandelwal4 жыл бұрын
Such a stunning demonstration of pinhole cameras. Optics blow my mind everyday as i am getting into the depths of it. I have myopia, so seeing through the hand slit was a Wow moment for me :)
@agustiaraelakh36236 жыл бұрын
Very well explanation, it made me understand right now about how does obscura cameras work. Thanks Physics Girl
@ajfillo72276 жыл бұрын
This is pretty sweet! Well done. So many ideas for camera obscura fun now!
@markholm70506 жыл бұрын
Some years ago, I read of a camera obscura in the back of a truck. They used a lens to get a sharper, brighter image, and then used very large Polaroid film to make photographs. The truck served both as camera obscura and as darkroom, with an audience inside.
@justunfoe5 жыл бұрын
HIGHLY recommend to google photography of Ian Ruhter. It's not about obscura, but the truck part remains and result is FANTASTIC.
@BassMatt19722 жыл бұрын
We worked this out when we grew up doing "Carnivals", and a group of us would pile into the back of one of the trucks (like a Fex Ex truck), to go to Maccas (McDonalds) for food. The whole trip was played like a movie inside the rear cab.
@jerrygundecker7436 жыл бұрын
This is a great video and a great lesson for my grandchildren. I love it. Thank you.
@twothreebravo6 жыл бұрын
On the old PBS show 3-2-1 Contact The Bloodhound Gang did this.
@iabervon6 жыл бұрын
First thing I thought of, too. Fortunately, her version is better. (If you want to see the Bloodhound Gang version again: v=-4273oOYy7s)
@khadijagwen6 жыл бұрын
So nice to see you back.
@kyle84426 жыл бұрын
Poor girl doesn't know why everyone is laughing.
@leg-1-ace7136 жыл бұрын
I am a current 1st year optometry student and we just went over this in optics 1. You do a great job simplifying and making this interesting for all to watch and learn! Thank you! How did you set it up with the sheet? Was the sheet between you and the pinhole?
@pbp67416 жыл бұрын
Excellent explanation.
@MakeBrooklyn6 жыл бұрын
That is awesome and OMG Lilly is just all of the cute! That is the best explaination I've ever seen of how a camera obscura works. Very well done!! Maybe a followup video that extends that knowledge to how an SLR expands on the exact same processes?
@michaeltuckerman69834 жыл бұрын
That was incredibly cool I never would have guessed
@unicorn73376 жыл бұрын
I love this channel more and more with each video! 😊
@PierrePblais3 жыл бұрын
there is an LA based photographer, Ian Ruther if i remember correctly, who does wet plate photography using a giant camera made from a converted truck using exactly this process, except with an actual lens instead of a pin hole for better resolution/exposure. really cool stuff.
@itsdeonlol6 жыл бұрын
Awwww she was the cutest!
@jonathanross1496 жыл бұрын
It's just like that episode of the Blood Hound Gang. The Gang got trapped in the back of a box truck, but the box had a hole in the side from rust. They were able to figure out where they were being taken by making the Box a camera obscura. Whenever there's trouble, we're there on the double.
@shawngreene35245 жыл бұрын
Excellent. Now I understand how camera works.
@nvrumi6 жыл бұрын
I think it was at Griffith Observatory that I first encountered a large Camera Obscura. That was so much fun (and so very long ago). Thanks for the reminder.
@NewMessage6 жыл бұрын
But... What about your polarizers?
@NiHaoMike646 жыл бұрын
That was a different video.
@NewMessage6 жыл бұрын
Referring to the t shirt...
@yem54624 жыл бұрын
U made no videos and u have so many subs
@WhatTheHeck12902 жыл бұрын
Dan Mace just did this
@mrmindswapper6 жыл бұрын
And what about polarizers ?
@johnsilb16 жыл бұрын
that was awesome! Great idea taking it such a large scale!
@ceekay31436 жыл бұрын
I love a good camera obscura. There is a little room that has been built as a camera obscura at Questacon (Canberra, Australia). Every time I've been there in the last few years though, the camera obscura has been shut off to visitors. Maybe a little dark room outside in the sun wasn't a good idea? Hopefully it's not because somebody wrecked it or misused the small dark space :(
@BigBird207 Жыл бұрын
Photography means "To capture light." Painters would use a Camera Obscura to paint a landscape, much like how people use projectors today. So, a lot of old landscape paintings, are actually a reversed image of what they were painting!
@beachboardfan95446 жыл бұрын
4:58 Whoever did that graphic, I want to give to a hug!
@shubham19996 жыл бұрын
Amazing Mam. Very nice video. Its always good to hear from you. Thanks.
@snehaaggarwal72566 жыл бұрын
Thoroughly enjoyed the video, Diana!
@coryman1256 жыл бұрын
Good scientific explanations, fun content, no clickbait... Could it be, a good KZbin video? :P
@robertlunsford13504 жыл бұрын
I saw this in an episode of 321 Contact when I was 12. I'm 50 now and optics still amaze me.
@rossburrow28136 жыл бұрын
I went to the Camera Obscura close to Edimburgh castle, so interesting. As it had mirrors and was almost like a periscope you could get a piece of paper and "pick people up".
@mayurvalvi136 жыл бұрын
Your explanation is really really good. Great video like always 😊
@jimbo3866 жыл бұрын
Try putting one of those spherical outdoor white lamp shades on top of the hole. That would make a cool little world effect, I think.
@erictaylor54626 жыл бұрын
Was that your daughter, other relative, or just a random fan. I hope no one ever squashes the excitement she has for science.
@breannraniola13356 жыл бұрын
She is her biggest little fan :) We just knew we had to make the trek from Vegas to San Diego so she could "Do science with Physics Girl"
@artschannel13596 жыл бұрын
3:13 this is why this channel is awesome.
@GrandadIsAnOldMan6 жыл бұрын
Thoroughly enjoyed that 😊
@multiio14246 жыл бұрын
While you were at it, you should've made the hole much bigger and put a lense in it (if you can find one that big with that focal length) to get a much brighter image. It might also be cool to experiment with non-circular holes to get different amounts of blurriness in the horizontal and vertical (or diagonal etc depending on the shape of the hole) axes!
@josephmauldin36 жыл бұрын
That was so cool!!! Great learning!!!
@okboing5 жыл бұрын
that little girl melted my heart... SHES SO CUTE!
@Lxo966 жыл бұрын
Another problem with tiny apatures is defraction, you'll actually be able to see less details at a certain point when making the aperture smaller.
@toamaori6 жыл бұрын
we used to do this in my Uncles truck when i was a kid... by opening the door just a tiny bit, the image or what was outside would be projected on the back wall.. but i think from memory that it was still the right way up and not upside down... the crack in the door obscuring the light outside differently than a pinhole does. Maybe that's something to try, with a tiny unobscured strip instead of a pinhole.
@vigneshnin6 жыл бұрын
To take a photo, use a CNC machine put vertically at the screen and use a photo sensor with 3 different colour filters and basically scan the whole area individually pixel by pixel by physically moving the photo sensor with CNC machine. You can use any sensor like IR or UV photo sensor (Filter)
@GoryionB6 жыл бұрын
Reminds me of an episode of 3-2-1 Contact, The Bloodhound Gang (kid detectives) gets trapped in a truck and uses a hole in the side as a camera obscura to figure out where they're being taken.
@barryroesch306 жыл бұрын
Oh! Hey, Diana! Is this why squinting works? Small spaces between eyelashes? Keep up the great work! I’m going to use this video with my science class when we study light in the spring.
@BeCurieUs6 жыл бұрын
So, what's up with polarizers?
@argir58496 жыл бұрын
5:40 oh, so this is why it works? Thanks!
@curtsteckel83066 жыл бұрын
I teach high school photography and have been teaching my kids the camera obscura and have been debating whether or not we turn the entire room into a camera obscura!
@sulaimonmaestro24366 жыл бұрын
For sure *Optics* _is_ *LIT* , but its more lit jus watching your pretty face talk science all day long {with interval breaks of course} , all your pure love for your craft is just sweetly combined... good one!!
@stephenbenner43536 жыл бұрын
There is a documentary film Tim’s Vermeer made by the magician Duo Penn and Teller about a friend of theirs, Tim, who experimented with a theory that the 17th century Dutch painter Vermeer (painted the girl with the pearl earring) used a camera obscura to produce his lifelike paintings.
@rwhe4237236 жыл бұрын
That subtle pun was also lit.
@knedy6 жыл бұрын
On particularly sunny mornings I can get a natural camera obscura in my bed room. I have really heavy black out curtains that blocks out all light except a sliver at the top so the light somehow reflects off the white ceiling I think and I am able to make out blurry shapes and colors on our closet doors. At first I thought I was hallucinating or still sleeping but it's there.
@RDGoodner6 жыл бұрын
Brings back memories. There was a kids show about plucky teens who use science to solve mysteries. One time, they got kidnapped and stuck in the back of a box truck. They managed to poke a hole in the wall and create a pinhole camera so they could figure out where they were being taken. The Edison Twins, maybe?
@sixstringskanker6 жыл бұрын
Speaking of massive camera obscura. You shoud definitely see the biggest picture made by camera obscura. It was made in airplane hangar and the picture showed nearby air base. Look for 'The Great Picture' :)
@MarcMeredithLA3 жыл бұрын
Was wondering if someone would post about the The Great Picture Project. I was fortunate to have visited the site when the project was underway
@Kuchenblech_Mafioso6 жыл бұрын
That's just amazing. Will you release the whole video from the moving vehicle?
@h7opolo3 жыл бұрын
4:28 you could also change the distance of the focal length.
@hamilpatel40256 жыл бұрын
"optics are lit", this is awesome
@nomeaknat6 жыл бұрын
In elementary school we did something similar with shoe boxes and tissue paper. It was so cool when we got it right!
@askakostera80306 жыл бұрын
OMG! YOU are genius! Why i didn't have school teachers like YOU?! Love YOU
@jerry37906 жыл бұрын
I think a few years ago in school we were watching some movie when I noticed an image was being projected on the ceiling through the window. After that everyone started asking to go to the bathroom and started dancing around outside to get in the image.
@AuroraNora36 жыл бұрын
6:27 you can also see this in the sun's reflection (?) on your camera phone
@Drum3Matrix5 жыл бұрын
Could you use a magnifying glass and focus more light into the small hole from the outside by putting the focal point right where the hole is?
@bassholic7056 жыл бұрын
Doughnuts and science is the best combination ever!
@njones4206 жыл бұрын
we call them Sugared-Tori
@willdupuis5 жыл бұрын
What a great video! I discovered camera obscura accidentally as a kid while playing inside a very large moving box. :)
@apurvmj6 жыл бұрын
Happy physics-king
@MultiPleaser4 жыл бұрын
A smaller version of this is to stand in a bedroom by the wall opposite the window, and hold a magnifying lens close to the wall. On the wall there will be an upside down image of the landscape outside.