How Fast Is It - 02 - The Speed of Light (4K)

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In this segment of the “How Fast Is It” video book we cover the speed of light. We start with the slow-moving snail and work up through people, animals, birds, cars, aircraft and spaceships. Along the way we graph speeds on a space-time diagram. Following the history of land speed records, we cover the speed of sound and include its nature as a longitudinal wave and its speed in dry air and the sound barrier. We then cover the Galilean transformations for converting speeds from one reference frame to another. We increase the velocities to the point where we see light traveling at different speeds as far as the Galilean transformations are concerned. We then show how Galileo tried and failed to measure the speed of light; Roemer’s use of Jupiter’s moon Io; and then we show how Antonio Louis Fizeau did measure the speed of light. We’ll also cover Maxwell’s speed of light calculations; We then cover wave interference and the Michelson Interferometer. And using the interferometer, we cover the Michelson-Morley experiment that showed that the speed of light was a constant. We finish with a look at the two main modern ways for measuring the speed of light.
Music:
@01:04 Giachino Rossini - William Tell Overture; London Philharmonia Orchestra; from the album The London Philharmonic Collection: Light Classics 2009
@01:53 Beethoven - Symphony No 7 Allegretto; Carlos Kleiber & Wiener Philharmoniker; from the album Beethoven: Symphonies Nos.5 & 7 1995
@13:12 Mozart - Violin Concerto No 5 Turkish II; Christian Altenburger, German; from the album 50 Must-Have Adagio Masterpieces 2013
@28:14 Joseph Haydn - Symphony No 98; Cappella Coloniensis; from the album 50 Must-Have Adagio Masterpieces 2013
@38:32 Chopin - Raindrops; from the album The Romantic World of Chopin's Piano, Vol. 3 2000

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This channel should have at least 161 million subs. But i guess only intelligent people enjoy the awesome voice of Mr Butler.

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Because he doesn't need numbers to show how brilliant he is, we already know

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@@Alasdair-Morrison WE know. That’s selfish if we feel his popularity and growth should cease expansion. He needs numbers so even more people can discover how brilliant he is, as their lives can also become enriched through his work. AND those numbers directly translate to Mr. Butler maximizing profit in well-deserved celebration of his efforts. Let’s help my man get paid. Those are numbers we can all agree he deserves. 😎

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Because people are not intersted in getting smater, just entertained.

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The master has returned

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Hey, mr.butler, I'm not one of these weirdos and conspiracy theorists who think you're doing something awful by sharing about how we know that there is a speed of light. I just wanted to chime in and say that I think your channel rules. I wish these weirdos would go away, but that's the internet for you. It makes me so happy, every time I see you post. I appreciate that it takes a lot of hard work, research, and expertise to produce these...

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This one has the light! Praise! Praise! God keep you brother LOL.

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Sir, I really must say, you are so great and so humble. And obviously SO BRILLIANT.

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So glad to see you back with uploads! I can't wait to get to enjoy this video in full quality. I remember how thrilled I was the first time I found your video series, and enjoyed them time and time again. Thank you! And have a wonderful time watching the updates from the James Webb telescope.

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Thanks David, great educational video.

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Love the videos...thank you for your time sir 💨

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Astounding.

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thanks David, love your work and dedication, i can finally understand many things, greetings from Venezuela

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What a great video. Thankyou David.

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Thank You Sir David. Impeccable as usual.

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I love these type of videos. Keep uploading!

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This deserves more views than it has.

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OK I agree. I'm going to watch it 3 times. 👍

[@ami2evil]

Nah, most people are far too stupid to comprehend any of this...

[@willk7184]

It is so helpful to have the graphics go slow enough that we have time to comprehend what's really happening. Thanks for your patient and lucid explanations!

[@JMSTipsAndTricks]

Thank you for so eloquently and succinctly sharing this wonderful information and the history of how people figured this all out. Brilliant job

[@RonnieD1970]

Awesome! More amazing content as usual!

[@luminousfractal420]

👍 for giving the snail some water for the vid :)

[@frauleinhohenzollern8442]

Looks like he gave the tiger angelfish water too!!!

[@oleran4569]

Wonderful stuff!

[@AbdulMateen-nt4er]

Was waiting for it. Thank you Mr David 🙏

[@dennistafeltennis1190]

I wonder how fast the Universe is expanding. One thing is for sure it moves faster then light.

[@tadswanchanyarakskul2532]

I'm so glad that you continue to produce more beautiful videos. Thank you so much Mr. Butler. I'm in tears.

[@fanofhumidity]

David, thank you for all of the great videos over the years!

[@frauleinhohenzollern8442]

".... His conclusion was: light was very fast" I don't know why but that got me to chuckle

[@rosellabill]

Great work helping us appreciate the different things. Including snails, the World has to offer.

[@G274Me]

Beautiful backyard indeed, and an even more beautiful cosmos we find ourselves in.

[@OVAstronomy]

Excellent video on an otherwise complicated and hard to explain topic!

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I absolutely love this channel. Thank you so much for all the great work!

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So glad to see you are back once again!! Love your videos

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So excited to see a new video from you, I've been patiently waiting!

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So glad to see a new video upload! Always informative and enjoyable! Thank you, Sir!!!

[@entropyachieved750]

After all these years of watching you, your channel is still amazing and finally getting the views it deserves. May many more years of wonderful teaching and discoveries come

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Glad your back .. was looking for something new.. Will keep this for my Saturday night screen cast ... enjoy all your work.

[@Allworldsk1]

Waited for this. Thank you 🌌🌌

[@steveseamans9048]

David, l’ve seen most of your videos and I just have say you are a extraordinary teacher. So clear and thoughtful. I just love your work! 😊

[@reynal_omnicide9217]

46 minutes of high quality content

[@mysterycrumble]

your videos are fantabulously good, sir!

[@xarzu]

David, I am grateful for the work you do. It is the most entertaining thing on youtube. Honesty is refreshing. And science if honesty.

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I hope you’re doing well mr. butler. You’re videos have been a nighttime staple for myself for years and I’m so happy more are still being released a just know you’re out here changing life’s with knowledge and information. You rock!

[@sarahlyons4552]

So glad to see a new video! I got through my pregnancy insomnia watching your videos, and accidentally became educated on some pretty cool stuff. Now I’m hooked!

[@Soyouvelosttheloveofyourlife.]

Love your videos David, thank you

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This is one of the few channels where, due to the exceptional content, I always give a thumbs up before the video loads. Thank you!!!

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Greetings from uk. Love you're channel ❤️ keep up the great work 👍

[@sup5356]

Thank you David. Excellent commentary

[@scrub_trash6680]

Hey david, im so happy to see the channel growing. I wish instead of 4k versions it was a new series :( But what you have produced is already a gold standard for science communication. Im so proud of you.

[@junkequation]

so excited for this upload

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Love this channel I've missed this

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Happy to see you back. Your voice is so calming

[@YaMumsSpecialFriend]

Always look forward to your updates and new presentations, fascinating indeed🖖🏼

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My favorite channel. Butler is a master.

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I’m from Brazil and wanna say Thank you for This Mr. Butler!

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Thankyou...Very Much! Special work that is deeply appreciated!

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This is my favorite series on all of KZbin

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Thank you, Mr. Butler. I have been watching your lessons for a few years and I've always enjoyed your explanations as well as the presentation. I'm glad you keep doing this work.

[@kjhman]

These videos are fucking fantastic. Such a breath of fresh air compared to the other stuff that’s out there with a a bunch of ads and people begging for likes and subscribes. Thank you for putting out great content in this day and age.

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Thank you for contributing the hidden knowledge of the universe and enlightening us in the simplest way. Keep such vibrations up 👍

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These are so awesome. Thank you so much!

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Glad to see another video from you, very interesting

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Glad to see a new video from you David

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Your videos are Amazing

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Love your videos!!!

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My first encounter with one of your videos. I must say that it is one of the finest of its type I have seen. Straightforward and unpretentious in presentation, but very satisfying in content. You should have a couple of million subscribers by now. Please continue with these very worthy programs, because the subscribers will eventually catch up with you. Well done.

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Notifications didn't work. This is the only channel I have them turned on for. ❤️ Quality content.

[@beekneed]

Watching these is a true joy. Thank you so very much for your dedication to such high quality communication. I missed the math & science boat growing up: I can barely multiply fractions and still don't know the order of operations. In spite of what might to some sound like a total disqualification for appreciation of the world of physics, I feel such a thrill of discovery and enlightenment while watching your videos, regardless. I can at least enjoy some small part of wonder in the beauty and elegance of our world, and an immense appreciation of & gratitude for the minds and dedication of the thinkers & scientists who CAN "do the math."

[@ironheart6704]

Thank you for en-lightining us, mr Butler. :D

[@Beer4Breakfast]

What an excellent lecture thank you

[@EndureTemptation]

Dude found and excellent hobby for himself in retirement making these videos. Invaluable for future generations! And for me.

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You are a treasure 🙏🏻 waiting for my kids to grow so we'll watch together your channel

[@osvaldo17924]

Thank you Mr. Butler. It’s so glad to see you back in the channel. I hope you can make a video about JWST. 🙏🏻

[@drhmufti]

I’m gonna hide this video from my Gran…. Those shorts! Young Man!!

[@raulc.]

Amazing, informative, smart and very educational. I always look forward to your videos. Please keep them coming. I know it takes a lot of time and effort to make your videos. Thank you very much.

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I'm doing my part for the KZbin algorithm. Keep up the amazing work!

[@williamtao2744]

thank you！

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Thank you for all your videos. They are excellent.

[@davidyancey2807]

God bless you for trying to school even some of the idiots that left the comments below. I get a little nutty myself sometimes so I am very grateful to have your work to watch to ground me, I have no way to tell you how much that means, but please accept my humble thanks for keeping the light alive.

[@davebewshey1549]

Agreed thank you for the incredibly thoughtful informative content.

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Glad to hear you haven't softened or dumbed down the music!

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Nice to see new content from you.

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Thank you Mr. Butler for fixing my sleep schedule

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I wish you were my engineering physics professor back in college. I always enjoy your work.

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Thank you David

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Thank you for the videos

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Thank you sir!

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Glad to see you again sir!

[@sjzara]

These are magnificent videos. Thank you.

[@muffinman8744]

Love this

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Love these videos!

[@robadams5799]

"The William Tell Overture" for the snail was a nice touch.

[@jlfolschette5947]

thank you for uploading this video; perfect descriptions and easy to understand. But I think having seen this video already in 2015.

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Thank you sir 🙏🏼🙏🏼🙏🏼 this is our favorite KZbin channel about science on the internet. God bless you more health and happiness

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Thank you.

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Uncle Dave puts out good stuff. Top drawer. Thank you sir!

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Knowledge and wisdom. Great chanel.