Conceptual Physics Paul Hewitt: why the sky is blue and sunsets red

[@moodyblue1727]

This amazing man was my Conceptual Physics teacher at City College of San Francisco in the late 70's... he wrote the book and watching this video brought back some great memories... One of the few professors names I can remember from those days and that was due to the impact he had on his students.

[@moodyblue1727]

That I was!

[@ameralamer7456]

Lucky you!

[@peretzo]

Red Remley i have his books. i envy you for actually having been taught by him

[@amarj9909]

@@peretzo 1.may I know what are those books? He used refer you guys .. 2.if possible can u mention some of his books. 3.Where can I find his full lectures from online?

[@peretzo]

Amar J Conceptual Physics (by Paul G. Hewitt), Conceptual Physical Science Explorations (same author...). Great books. Look them up on Amazon

[@palasako8732]

Am reading this guy's textbook right now. Absoloutely the most brilliantly well done book EVER. So simple and concise. It lacks in teaching the math side of physics but OWNS on the conceptual side.

[@falsehoodbasher7240]

Well teachers test the math side so how screwed are you right now ;)

[@con-gic.ceptlo8984]

That what we need from physics. Once you understand the concept, it is easy to calculate. Concept is the base for the derivation of formulas.

[@jacoblara4820]

I love Paul Hewitt, I always called him the Bob Ross of physics he’s so passionate and happy about what he’s doing

[@bijutashok]

This is awesome... I have been a Physics Teacher for last 10 years and I have never inspired the students like this... he has perfect conceptual clarity over the subject matter... really inspires me to be like him, 'an inspiring teacher'... thank you for sharing this video...

[@wordierneptune6121]

I wish we had teachers like this at our school... my teachers don't remember that learning can also be fun :.(

[@McRat1968]

I still remember the day I was in his class in 1987 and he posed this sky question: As soon as he asked, "Why is the sky blue?" I countered, '...It IS?!?!?!" ...(I live in Pacifica, where it's often grey!) LOL. :)

[@zeporion6091]

You can hear the class giggle when he says "vibrators."

[@Mswordx23]

Now, listen up, gang. Raise your hand if you think this is the greatest teacher ever. Check your neighbor. Who says, "Yeah, that guy's pretty darn great!"? Is he? The answer begins with a 'Y'. Ends in an "es". YES!

[@kodeine222]

paul hewitt is my favorite teacher

[@mrvlhs]

4:00 "We can do this experimentally" My favourite words.

[@varunnurab]

I wish I could be there. Never saw such a teacher. Awesome!

[@eraybulgaria]

I cant stop watching these videos 😄

[@SmartWentCrazy]

This guys series is great!

[@GrasiCarter15]

his book conceptual physics is amazing too

[@rrekaj13]

I hope I have a professor like this when I go to college.

[@salimk5518]

the most amazing teacher

[@kaskagonera2874]

wow what an excellent teacher, great video, very informative !

[@angelicabaroso2154]

I just read his book and now i'm watching him teach. Unbelievable. Great teaching strategy 🥰

[@darshanikumari5573]

Woow ..actually very nice..

[@Vermathorax]

I am so lucky. This guy reminds me of my Physics teacher :) my teacher had a tendency to trow things... Great video, thanks :)

[@misswhiplashish]

Fantastic!! Even if slightly scary...I'd love Physics tutor like that!

[@arpanpiano]

beautiful explanations!!

[@kodeine222]

how do they hear blue ?how did they know that and when he said bling or bring

[@vinaydeshpande3643]

what a teacher ! i wonder if i would have got him !

[@carmenjohnson9138]

Beautiful

[@soosoo599]

KIND OF TEACHERS WE NEED. I JUST WANT TO FORWARD THIS TO MY PHYSICS TEACHER, PROBABLY I'LL BE SCOLDED AND THAT'S WHAT MAKES THE DIFFERENCE.

[@pushpamsingh3870]

The beauty of science is you can do it experimentally, not only in your head.

[@em-ef8be]

Love you Paul 💞💕💓💞💖💘

[@kungfukiddie7332]

legend!

[@dosvecesj3222]

Loved the book...

[@alexhewitt1000]

THIS IS MY GRANDPA

[@sunritroykarmakar4406]

Alex Hewitt WOW

[@mybluemars]

This is the best explanation I have ever heard about this.

[@falsehoodbasher7240]

So a dictator " teacher "'s explanation is "the best" to you SMH

[@Azmina_the_warlock]

Sunnism EXPOSED: The Hidden Sect dude what is your deal?

[@DedicatedCinema]

What grade is this for?

[@Bike4life5]

That was beautiful.

[@kylefer]

This guys awesome.

[@clippedwings225]

The only good thing about my physics teacher is that he played Paul Hewitt lectures for us. Other than that he was just an ass.

[@justinwinn01]

I like this man

[@ModestMuslimah15]

He's totally great. Teach me in Physics HL please.

[@amberspicks547]

Blue eyes are from Rayleigh scattering, too… so what exactly is vibrating in that case? And they are at least a wavelength apart? And what about grey eyes?

[@SushilKumar-mp4tg]

it has to be the best explanation unquestionably......everyone i heard was just beating around the bush .They were not not getting to the point just repeating the same shit ie scattering is inversely proportinal to wavelength. May be they themself didnt understood it.........great job.

[@abcdef2069]

at 2:02, O2 and N2 he said and they interact with light he said to look blue later, the fact is the visible lights do not interact with O2 and N2, or we will have the massive green house effect, the light interacts with CO2 and H2O and CH4. can someone explain this to me why blue in the molecular level, not in the paul level. everyone know UV and infrared is opaque in H2O, only the visible spectrum of lights can pass through the air so that all life form on earth see the visible range only. opaque means absorbed, scattered then interact often to be absorbed again.

[@taymabekawi5271]

so amazing lecture 😍😍😍😍😍

[@some_one_2_3]

I don't think the experiment was that clear, but is diagram and explanation was brilliant!

[@dianakris14]

I really learned a lot.... :D

[@grzegorz16100]

That is what bible says!!!

[@alexandriaboire5164]

Love this guy...an ol'gal gets it! WOW.

[@AdrianVrabie]

So how come we never see a green sun?

[@jaymcd84]

YESSSSSS!

[@azadkhachatrian4474]

loving all the sarcasm in the comments

[@valtih1978]

What is the proper color of the Sun? I think that this is important also. Sun is not white because it is absolute black body and black bodies have a mode in the spectrum.

[@matunam250]

Valentin Tihomirov it all depends on the light that you see from it, but the sun's natural color is most likely white, because it gives off so much light, and when mixed, they become white

[@valtih1978]

Which law says that maximum fades off when all amplitudes rise?

[@cwliias]

I would be so frustrated in this guy's class, i wouldn't be able to learn like this at all XD

[@xanecrown4545]

alter the composition of the atmosphere and get your wish

[@Myoo263]

why is he not memeing

[@wownoob1234567890]

I love this guy lol

[@AlbertoRojo0]

Nice lecture, but unfortunately the explanation is wrong. The "bells" (atoms in the sky) are not resonating with their own proper frequencies (high for smaller bells). The molecules are FORCED to vibrate at the frequency of light. And they reemit light at that very same frequency. Interestingly, when the frequency of the force applied (light) is very different (much smaller) than the natural frequency of the "bells", the amplitude of the light emitted is independent of the frequency. So all the molecules, when excited by different frequencies of light, oscillate with the same amplitude. Now, the electric field emitted by an oscillating molecule is proportional to the acceleration, which in turn is proportional to the frequency squared. And the energy reemitted is proportional to the square of the acceleration, which in turn is proportional to the frequency to the fourth power. In short, the the reason why the sky is blue not the higher "pitch" of the bells.

[@Hajeh22]

This guy reminds me so much of John C. McGinley

[@Nyarlathothep]

I thought you could only hear colors if you were on acid.

[@dayswillburn777]

@kapullas physics is the study of God's design, think of it tht way:P

[@IceCregon]

BE MY TEACHER PLZ!

[@wazer7693]

reallY ?? u so lucky!!

[@chenmaluto]

I want him to be my teacher. :)

[@cecariah0263]

BING! The little bell goes bing! moluc --c MOLUSK

[@mishfishy7645]

Physics daddy

[@btirador]

Teach my class please

[@anonymousperson1170]

the sun 150,000,000,000 kms away

[@theperfectionist]

wrong, it is 150 million kms away not 150 billion

[@N0Xa880iUL]

@@theperfectionist Or 1 A.U.

[@cbsk341]

What starts with F and ends with iziks? Fiziks!!! Yee

[@commanderthorkilj.amundsen3426]

He’s written and illustrated outstanding HS and college textbooks. Has an engaging style, but uses over-done gesturing and oddly chosen objects to explain principles, felt to be distracting, by my students. They found his books more helpful

[@ActiveStorage]

up in the sk sk sk sky?? molec c c cules fing gold!!

[@kokkosbollful]

e=mc^2 its all i know

[@karenepic]

@kapullas haha

[@saris42]

Way to NOT explain... Worst example EVER. Sounds tuning forks???/ imagination???/ and then he tells us that we do experiments to test these things out, not just in our head.. And then the whole "Experiment" is forced to be in their imaginations..

[@LionDusty]

HC gang?

[@theearthisconcave1395]

this is highly incorrect, the sun is apparently millions of miles km not thousands , and the reason there is a blue sky and a red sky is because the sun is actually very close! and it moves around us! we live in a geocentric universe, as the sun moves towards you blue shift, as the sun moves away red shift

[@poldiam]

Wtf?

[@rolefko4189]

Earth is not A Globe , stay in your egocentric universe.

[@sunritroykarmakar4406]

LOL

[@Espionage-gq6ds]

Dude I think you should've some hot dogs with extra chilli to get out of your illusioncentric universe.

[@dackelvotoc6477]

The reason sun set is red because the sun is moving away from the observer :)

[@theearthisconcave1395]

yes on a geocentric universe :)

[@falsehoodbasher7240]

Can geocenticists pass physics?

[@dsanzo]

@saris42 1. get some sense of humor. 2. you need to use your brain to understand physics ultimately, you need to be abstract.

[@wazer7693]

u stupid

[@kapullas]

Sky is blue because God wanted to.

[@falsehoodbasher7240]

This dudes the epitome of tyranny. Demanding his poor children REGURGITATE his forceful spewings and get upset when they start to show signs of INDEPENDENT THINKING. Wow

[@ChrisdoperMichigan]

Thank you what the fuck this isn't first grade english class fucking jackass

[@em-ef8be]

Love you Paul 💞💕💓💞💖💘