Sand, light pendulums-Lissajous patterns-part two // Homemade Science with Bruce Yeany
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- เผยแพร่เมื่อ 7 เม.ย. 2017
- Capturing the movement of pendulums using light and a camera can be an easy and beautiful method for students and adults to learn a bit about the harmonic motion. The movement of the light is captured by having the pendulum swing in a room that is completely dark and then using a camera to take a long exposure (leaving the shutter open) of the moment. The shutter is left open for times of about 15 seconds up to about 6 minutes.
These drawings are sometimes referred to as Lissajous figures or physiograms and in this case are the result of changes in direction of a swinging pendulum. These setups are easy to build and can be adjusted to give a variety of patterns.
A pendulum that begin with a single strand of support or may be changed to have two points of support which will alter the periods of the pendulum as it moves on two perpendicular axes at the same time.
Note on comments: I appreciate seeing comments positive or negative, and learn from helpful criticism. However, I am a middle school teacher and many of my students visit this site, I will remove comments that I feel are inappropriate.
You are the only reason I actually pay attention to science.
STOP TRICKING ME INTO LEARNING.
(Please keep tricking me into learning)
Hi Summer, I think I have a few more tricks up my sleeve, I will keep them coming
Oh yes.
"Keep Summer safe (from learning)." (exterminate)
He is good at science
The world needs more people like you. Specially middle school teachers that can inspire kids. Where I'm from, science and mathematics are taught as far removed from application as possible with the "If you don't suffer it, it's not meaningful" type of mentality.
Although I'm in a Spanish speaking country, I'm here to enjoy the well deserved growth your channel will surely see. Maybe someone down here will become infected, to use a nasty word to describe something wonderful.
Well done, Sir.
thank you, I do hope that the information and ideas that I've gained over the years will be useful to others. My goal is to show that it's not that hard and it does motivate students. I appreciate your comment.
Bruce Yeany, you never cease to amaze. I am a PhD Student studying Chemical Engineering, and you make me wish I were a High School Physics teacher instead. Thanks for another wonderful video!
I love it thanks!
Wintergatan woaaaaahhhh you're here 😘 love your vids 👊
go build a machine stop watching youtube you genius
How inspiring! You're a naturally gifted motivator. Thanks Bruce!
Excellent as always!
This is one of the few channels that makes me squeal with excitement when I get the notification for a new video!!!
Coffee, laser, Lissajous patterns... It's a good morning. Thanks.
You got my 100% attention. Your detailed "how to do it" was very helpful, thanks.
there is so much order and organization in nature (and science) its just too beautiful *_*
thank you for this!
People like you, sir, is what we need to get kids interested in science so we can make a better world. Im a Chemical Engineer and im amazed with your work! Congrats
oh man. The creativity of it all. Love every second of this video.
Absolutely beautiful Bruce. Well done.
GREAT STUFF" I really don't know why 55 people gave a thumb's down , anyone who shares knowledge is a icon in society ,Thanks Bruce what did I learn ,well for a start that there is a "h" in tumb
Oh wow, those shots were absolutely gorgeous!
Beautiful patterns of nature ♡ Thank you for sharing 😊
I can't wait for your next amazing video!
I hope to someday be a teacher like you. thanks for so many experiments and everything else.
Just lovely. How a little bit of interest in doing something practically can yield such satisfying observations and results. :)
This should be displayed as art. Hats off to the teacher!
I hope your students appreciate how lucky they are to have such a creative teacher!
Hi Bruce. Im studying physics teacher in Argentina and im taking notes regulary of your experiments and experiences. Thanks and keep working! I hope be coolest teacher than you :)
HI Fran, nice to hear from you and that you are finding my work helpful, I hope to see you here on youtube, better than I am. Good luck with your studies
Wow you made some very pretty patterns. I love long exposures.
science is a major part of our lives for us to explore the wonders of life.
Most creative. Truly amazing. mind blowing.
You are such a great teacher! I wish college professors were like you.
Wow I enjoyed this even more than the sand pendulum video!
Thanks a lot! I love your experimentation, the simple but effective and analogue solutions you choose, and the structured but creative way of exploring a field. Very inspiring!
thank you Erik
some of the results are insanely beautiful :D really impressive
I put 3D glasses on when he did the blue and red one and it actually worked lol.😃
Llc Funfun i was thinking about that. im glad it works
uhmm coolest science teacher ever! pay attention kiddos. These are the type of people you should see as role models. Follow your interests. Thanks for the video Bruce
and thank you for your kind words
Simply incredible
I wish I had you as a teacher! Great videos!!
If teachers were like this guy, learning would b so much fun & easier. Keep up da good work & plz inspire ur students 2 b like u. This world needs teachers like u.
Thats awesomeee. Im definetly trying this.
This is a great demonstration of how parametric equations work too
thanks sir we proud you are our teacher
this looks amazing. The one at 6:19 might be my favorite with 2 paterns in 1
that's awesome, great science art !
Thanks again for a great video!
great teacher from ACHS... i actually paid attention.... thanks mr yeahney... cool videos
That is so cool!
Great video Bruce, the effects with the sand were impressive, but with the light and long exposure camera, that was amazing! It reminds me of some of the patterns you can make using an oscilloscope and a couple of function generators.
I am so glad I subscribed to you! My OCD soul thanks your for such great perfect patterns
This is beautiful. I think I'll try testing it out sometime :)
Awesome idea 🤙
I find all this videos quite interesting and another way to understand science, I'm more of the creative type of person, and I don't get stuff with just theory, I have to see it, in order to make it make sense for me, and this helps
Beautiful. Waiting for the painting ;-)
I wish I was still at school and you were my science teacher !! 😀
Beautiful!
genial profe, saludos desde argentina
It's interesting to apply the knowledge of those patters to the Lissajous patters I'm able to create with two signals into an oscilloscope. It now makes more sense.
Amazing pictures! It´s really interesting: at some my mind told me that this picture should be 3D! In reality it was actually a (more or less) 2D movement, but just placed in the correct way, cool! Your experiments are so faszinating and inspiring, I love them!
I just watch this video and it shows the beauty of science. I tried to drow this pattern by computer programming before, manipulating the sine and cosine function on it. And that's very cool.
very pretty. Wish I had had a teacher like you!
amazing experiment. tanks mr
Encore plus extraordinaire
Very awesome stuff!
With the lights, I keep thinking about how we observe celestial events and the amount of time it takes for us to perceive the light from the beginning of the event.
Considering that we are mostly seeing ghosts of the universe when we observe the night sky because of the distance the light has to travel through space to our eyes and that the pendulum in the video is essential in "orbit" around the central pivot point (a planet orbiting a sun having gravity pull the planet toward its central mass [the weight of the pendulum being slowed down until it stops at the central pivot point]), it is plausible that a lot of the intricate designs offered by the universe is in fact a single object tracing its path allowing the deigns to form through light years of exposure. Much like the extended exposure time of the camera used in the video.
Just some interesting things to ponder :)
The dual color ones look like the old red and blue 3D images. I wish I had a set of those glasses right now. :) That's really cool!
Very neat!
Ho much fun and education students must get in your classes!
Great idea, thanks
this satisfied me so much
ma shaa Allah..this is a very important inspirationnal experimant ..thank you sir
Man, you got some groovy music in this intro. I love it. Seriously. Oh, and the content is super cool also, as always. :)
I have a question, is this material in your curriculum or do you do these videos for another reason? Keep up the great work, we (your viewers) appreciate it a lot!
Thank you, probably about 1/2 of it is used in any one year in my curriculum, there is not enough time. Some of it I've used for extra programs or classes, quite a bit of it is for my own interest. This is 40 years worth of building and collecting materials, and still have quite a bit more to show.
Well done. Another well done for documenting it and sharing it with us.
Awesome ideas
Please be my science teacher
you are truly amazing
Beautiful
Bruce Yeany Hello again and thank you for yet another marvel of a video. I simply wanted to suggest that you make a note to the viewers that at around 4 minutes and 20 seconds (04:20) when you pull on the pendulum's string (reducing it's length) you also change the axis of your camera and the images are from the side profile, not from a bird's eye view. Given the com[plex nature of these patterns I found the omitted info left me confused for a while until I worked out the change in photography.
Please keep posting your inspiring work.
Cheers and all the best.
thanks Lank, a note now appears in the video
Stunning. I know what I'm doing with my camera when the northern lights are being shy, I'm buying some LED lights!
Swingn' good!
Hey, Bruce!
Wow, some of the patterns are real masterpieces!!! So complex and so beautiful at once... oO
The "red/blue" ones remind me of 3D patterns...
Oh, BTW, 3D could be an interesting topic for an upcoming video. What do you think?
Thanks a lot for your awesome work over and over again!
Big thumb up from me and best greets from France... = )
Hey Bruce, great video! Would you perhaps mind to go a bit into the mathematics behind those patterns in the future? That'd be really cool!
Incredible
great stuff
You sir are amazing
This was epical cool.
Parabéns pelo trabalho.
Eu estou me graduando em Licenciatura em Física e espero ser capaz de levar um pouco do que eu aprendo aqui para os meus futuros alunos.
Excellent
That’s a great idea....
Great work Bruce..... My son (3 1/2 years old) and I are going to have a lot of fun testing out your experiments. All the way from Melbourne, Australia :)
thanks day tripper, nice to hear from Australia
looks like the shapes of different galaxies
So cool :o
You just earned yourself a subscribe bruce. Can you briefly explain the kind of math related to a pendulum wanting to reach equilibirum? Is it related to a function like sin or am I thinking of something else
half of them look like galaxies and the other half look like Windows XP Screensavers
So true
im gonna do this
The 2x LED's from 3:31 might also look cool with 3D glasses !
Thanks for the wallpapers Bruce :D
excellent, I hope you had a high enough resolution, if not send me an email address and I will forward them at a higher rate
No problem, They look good enough :)
Hey Bruce just stumbled across your videos, so cool! How are the final images ultimately captured? I see that you leave the shutter open but do you just take a picture like normal and that's what is captured?
Hi Nicholas, the room is dark and camera is mounted on a support right above the light hanging down on a fishing line string. I leave the shutter open for 1 to 5 minutes. most point and shoot cameras have this option
As an artist, this is fascinating to me! Where would I buy the exact materials to create my own? I’d need as many specifics for each component as possible to I buy the correct items.
A new art movement
♪you blinded me with science♪
Bruce I think you should have saved this for last. it's way cooler and cleaner than the sand or paint will ever look.
oh, and it's amazing! thanks.
well, this is the first round for light pictures and I kept it simple, I have some ideas for future ones so hopefully the best is yet to come
Bruce Yeany can't wait!
very goog nice
thank's
I would really like to see what happens in an environment with lesser gravity.
Do you have more details on rope lengths and how to get certain images
sorry, I didn't keep track but basically when the double support length is very small and the single support is long you get very fine patterns since the ratio of period movements are about the same and as the double support gets longer the pattern changes more quickly, best thing is to try it. I think you will be pleased with most every setting.
Hey Bruce!
what would 3 strings at the top do to the pattern? you've tried 1 and 2, and 4 would just make the line shorter.
It might have been covered in the first part, but thought I'd ask anyway.
Keep making videos, we love them!
HI Corgi, in these first videos I kept the devices simple, I hope to record some more complex ones in the future. Haven't tried 3 or four strings and then a single string but I'll give it a shot. I do want to do a harmonograph type device which is a small table suspended by 4 strings and swings as a pendulum table, it has the additional movement of torque. I have one, just haven't gotten a chance to video it yet.
He is good at science
Hi Bruce, is it possible to use multiple V sections? perhaps at different angles and length.
it won't work with more than one V section, however, the next option is to hang piece of board as the table and allow that to swing