Geometric Optics Intuition with Mirrors and Lenses Concave Convex Diverging Converging | Doc Physics

This video has it all. Seriously, all of it. But no math, and no ray tracing. But maybe you just want to understand. Who can blame you?
Just look at the light in that thumbnail bending away from the normal to the surface as it exits the plastic. All of geometric optics with lenses stems from that simple effect.

[@catchthekite]

I had only ever seen this with lines on paper. Seeing this done with actual light is beautiful! Thank you so much! Also love the enthusiasm!

[@joanyoon4672]

I am very grateful!

[@DocSchuster]

I never really liked lenses until I started playing around with them more. I hope you have a chance to experiment, too!

[@TigaToonsELTiagor]

I had in middle school; one of the best lessons I've had.

[@elo9639]

Very helpful for me who wants an actual example of the lessons! I also love the enthusiasm. Thank you very much for this!

[@suzannekostrewski3237]

Very helpful! This was hard for me to visualize but now it makes sense. Thank you!

[@GanzuGinisu]

when im into the whole thing Doc: okay bye

[@xyxy2028]

you make me actually want to understand physics

[@DocSchuster]

You can get lasers for just $5 at Walgreens these days. Diffraction gratings are cheap, but you'll have to order them from a science supply store: Diffraction Materials Card ($6) at Wards?

[@DocSchuster]

Thank you! I hope to visit the Philippines someday. I would call that light a "ray box" or something like that. It came in an old "blackboard optics" kit that our school has had for decades. Laser ray boxes are easy to find now - I use those in another optics video (lenses, I think). Keep up the hard work!

[@thatmd]

Thank you so much for doing this. I wish I found out about this channel earlier. I will share this with everyone I know taking physics or prepping for an entrance exam like the MCAT, DAT, DOT...etc. Thank you for taking your valuable time to do this.

[@DocSchuster]

+Elie Ghaseb That's very kind of you! You're welcome.

[@hb6839]

You were my favourite teacher in intermediate, you're my favourite teacher in medicine. I'll never forget you, Dr. Schuster! 💖

[@DocSchuster]

Thanks! I agree with your assessment of many demonstrations. One must present cliffhangers and teasers or the kids shut down. And there's so much beyond even what you and I understand, so how can we keep from being excited?!

[@nilsacred8180]

Beautifully stated sentiments ;)

[@rodolfodumaliangiii7342]

You actually discussed and gave all the important info of all the topics worth of 3 classes in my university.

[@user-sw7bv9vv9y]

u r very interesting ... if u give me the lec. in my university sure i will not only love physics but also i will love the university :-)

[@DocSchuster]

I apologize for my oversight, and I thank you for your constructive criticism. I've always been sloppy on a couple of those typical mistakes. I envy the British, who seem so effortlessly to speak so flawlessly.

[@B3bita1215]

Wow Sir, you are a genius!!! Thank you Sososooso much for the perfect explanation. I'm so happy to be able to finally understand this concept that I can literally jump up and down and scream "You rock Doc Schuster!!!"

[@joutakujo5621]

wow thanks for the video sir. i always thought that optic is a boring subject to learn. but now i am more and more understand right now. thanks

[@joutakujo5621]

fyi, my school doesnt have optic kits like these and very stritch about their lab's tool. so we have to learn everything from book. which is less fun

[@naosukeyamaguchi504]

Thank you soooooo much for your videos!! I've watched all of your optics videos now and I understand everything now for my test tomorrow!!! Your videos are amazing please keep making them!!

[@DocSchuster]

You are very welcome!

[@mdmobashshir432]

+Naosuke Yamaguchi EVERYBODY HAS TEST TOMORROW!?

[@LanaVlogs]

I love hos excited you are! Very interesting way to get us to actually care about those lenses. I actually have a favorite now! :D

[@ElementalMaker]

Great video! Doing some lens experiments right now and this was hugely helpful! It's been way too long since Physics 211 to remember much about lenses!

[@DocSchuster]

I just bought them from a catalog, actually. They're made in India, they're really nice, and they're not pricey! Hooray, India!

[@muhammadhussainsarhandi9928]

Sir can you please share the link from where you bought that light source, mirrors and lenses?

[@mattNYSD]

"BOOOM!" lol

[@PokeRapper5000]

Wow, after years and years of reading about this in textbooks I never quite understood it. But after seven minutes of video I feel like it's the easiest thing in the world. Thank you very much!

[@emogirl2857]

THE WORLD NEEDS MORE TEACHERS LIKE YOU

[@amits770]

Whoaa..! Great VOICE Activeness And the way to tell!

[@carissawilkins3881]

Thank you for the help! Optics makes so much more sense with real examples.

[@DrPinball]

Great video on Convex glass. Thank you very much!

[@DrTaid]

I love you! I'm a visual person and you made it so simply. Thanks!

[@demonicangel754]

Thank you very much for uploading this video. I don't know what to do with my task if this video doesn't exist!

[@DocSchuster]

You bet! Thanks for the feedback.

[@MyWorld-sx2tq]

That was amazing! Thank you very much, sir

[@DocSchuster]

It's wood (?) with silver on both sides. Not an ideal mirror, but great for demos.

[@SalixCanAlba]

2:36 me 2:41 life

[@saikumar3269]

Thank you very much this is so clear to understand

[@lukeomatik]

i love his enthusiasm

[@Waadee101]

Hey Doc, this is a great video. Could you please tell me where can I buy this kit, that you are using to demonstrate all this physics ?

[@maximshekhovtsov4766]

that s extremely fascinating! It acceptable for comprehension totally!

[@vaithi2]

beautiful sir i undertand instantly

[@mattNYSD]

This is great. Thanks Doc.

[@ScottyP5947]

very cool! What kind of light source are you using or would you recommend to do this demonstration? Thanks!

[@0wlaeiogn4]

This is better than my teacher's explanation

[@mendebil]

this is so fun :) Boom! Thumbs up man!

[@greennwood]

thank you for this video !! it is so much fun

[@wildan9082]

Amazing demonstration. I have always been curious about what my camera lens is doing.. how they can change the directions of light coming from any angle into parallel light that is projected onto an image sensor.

[@therhythms250]

good job easy to learn ray optics

[@DocSchuster]

Sorry, it's been many years. I have no idea. Some came in a "blackboard optics kit," so you could search for that or "acrylic optics blocks" or something. Best of luck.

[@DocSchuster]

I would try a web search for blackboard optics kit. Our kit is VERY old.

[@imcaaathy]

Hello. I'm Cathy, a Physics teacher here in Philippines. I found your way of lecturing as funny yet informative! Because you really made me laugh with the words you are using. :) But I have a question, what do you call the source of light that you used upon making this demo? Thanks and more power!

[@LanaVlogs]

I wish I did but I don't. I had the opportunity to play around with prisms in physics this year but I think I didn't appreciate them back them as much as I do now. I wish I could redo my first two semesters of physics now that I understand everything better. When am I ever gonna have the opportunity to work with lasers and diffraction gratings and all that cool stuff... It sucks that I didn't enjoy it while it was happening.

[@freeflyk4511]

Thanks, its very intuitive demo

[@vijayakumarr8237]

Pretty practical and cool...

[@marcinkulus2706]

Cool video, explains the matter better than the others I could find on KZbin. But You only cover Plano-Convex/Plano-Concave Lens. Could You also cover the lenses convex and concave on both sides?

[@DocSchuster]

It's the exact same thing but twice as much umpf (or half the focal length) for a given radius of curvature.

[@studyboos5704]

Thank you sir you save my life

[@manologaribay]

hey!!! question--- did you cut by laser your acrylics? or how did you made them??? thanks for the video!!

[@iantheorem]

MIND BLOWN! D:

[@chriscycles6845]

what do you call the thing you used to give the beam of light?

[@stefanpanmk5371]

chris cycles Laser

[@PhDsayshuh]

Very good video. . . .that intro bit about someone emailing you was a bit odd though.

[@aleksandrafanasyuk5758]

that was intense:)

[@DocSchuster]

Thanks! Yeah. You know when you try to be funny and it just doesn't work? At all? I think I'll crop that out now. Thanks for the reminder.

[@magicmike1122]

I get about 4 for the index of refraction just off a rough estimate of the angles of incidence/refraction. I'll do it again later more accurately.

[@industrialdonut7681]

mio lol 4 is way too high I think, like literally I just read the highest refractive index in nature that germanium can do. Glass should be around 1.5 I think

[@vijayakumarr8237]

One thing I could not able to understand on mirror lenses used in DLSRs. Will the mirror in the center of the lens is an obstacle?

[@ksblessed4754]

great job, stay blessed

[@asitkumardas6881]

Sir, please please please please please make a video on show how spherical aberration occurs in convex lens, how to reduce spherical aberration using plano convex lens by experiment.

[@ghadirlida5115]

Thank you so much💙

[@manologaribay]

Doc!! would you mind, if you have it available, the data for buying those things? the webpage perhaps??? Hooray optics!!!!

[@jishnavi-jayshreegaur3525]

More optics from you

[@shivanihr5879]

I have question. Why does a plane mirror reflects light and not reflect image. I mean we can obtain that reflected light beam on a paper, but we can't obtain a reflected image on a paper (from a plane mirror)?😕

[@sydneystradecke9889]

thanks you help me with my test

[@jitendrapandey1085]

Sir can you please tell how do you get that beam of light for the experiment. I am interested in knowing the source of beam.

[@bijoydas6044]

sir, please shows how chromatic aberration occurs in lens ,how it is reduced by plano convex lens by experiment

[@ninenrendon]

sir, what do you call the mirror that you used to demonstrate converging and diverging lens?

[@rockstar1720003]

Thank you!

[@fabioferreira3320]

What are you using for led source, how do get it collimated?

[@BrazitodeWawa]

What's the light source? What brand? You need numbers or otherwise it makes no sense

[@AbbyHendro]

Very very Thank's !!

[@DocSchuster]

You bet!

[@2.88milemushroom7]

Perfect.

[@salprieto9846]

wow, this explains how we see the world

[@zero_9717]

Thank you

[@lifegamero]

Hi Doc! From Where I can get thise type of lens and mirors ?

[@DocSchuster]

Extra time is one of those things I don't have. Best of luck on the problem, though.

[@theeewebdev]

Inverting the plano convex lense will be ?

[@abhishekg2380]

Sir I want to know what will be the thickness when line coming out from the lense..any formula to calculate

[@divyat7948]

sir..cud u plz tellme which side of concave mirror is polished with silver??

[@comic4relief]

Just what precisely is a "ray of light"?

[@user-ly9vg7bp6l]

わかりやすい👍

[@bakuleshrane6232]

SIR ,WHAT IS THIS QUANTUM JUMPING ? COULD YOU PLEASE EXPLAIN IN SHORT ?

[@DocSchuster]

It's going through a brick wall rather than going around or over it. Except neither you nor the wall are damaged, and it doesn't happen very often.

[@schwartz478]

Doc Schuster where can I get that light source appliance? What is it called?

[@bridgendesar]

+JorgeSalasify A cheap laser line generator would do the same thing, search ebay for laser level and you can get one for less that $5 that looks like this i.ebayimg.com/00/s/MTAwMVgxMDAx/z/hjoAAOSwHPlWfJe6/$_12.JPG

[@LanaVlogs]

And since we're talking about it, would it be too much to ask you for your help with this one particular problem that I have to solve. I am having troubles calculating the angle of incidence so maybe if you have some extra time i could send you a photo and the details of the problem and you can help me figure out with the equations. I don't want to bother you or anything

[@dnz86penshoppe]

WHERE CAN I BUY THOSE MIRRORS USED BY YOU SIR?

[@kelcamer]

Which LED is that?

[@ShaileshPanthee]

make on video on cylindrical lens

[@sto2779]

this dude really likes optic physics with his legitimate expression of enthusiasm lol.... i know for a fact it's all real... nerds like this type of shit.

[@hahahahahohohoho5085]

What is mear??

[@katelynlamperouge1612]

yeah i’m fucked for my physics test

[@AntonVagabond]

I was reading the comments to see if someone had calculated the index of refraction to compare, but I think no one did xD, anyway, I got about 1,53

[@nikkikumari3268]

👌👌👌

[@iCanHazTwentyLetters]

Are you a teacher? The correct answer is yes. Please send this to all "teachers" in the world ever.

[@evdm7482]

Quantum whatever, what, don't can't not even. fine byeeeeee

[@elo9639]

Very helpful for me who wants an actual example of the lessons! I also love the enthusiasm. Thank you very much for this!

[@therhythms250]

good job easy to learn ray optics

[@therhythms250]

good job easy to learn ray optics

[@therhythms250]

good job easy to learn ray optics