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

Conceptual Physics: Why the sky is blue and sunset red.

[@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.

[@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!

[@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

[@wordierneptune6121]

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

[@zeporion6091]

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

[@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

[@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. :)

[@GrasiCarter15]

his book conceptual physics is amazing too

[@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.

[@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...

[@em-ef8be]

Love you Paul 💞💕💓💞💖💘

[@arpanpiano]

beautiful explanations!!

[@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.

[@Vermathorax]

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

[@oliobgmoti-bulgaria8401]

I cant stop watching these videos 😄

[@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..

[@kodeine222]

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

[@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?

[@kaskagonera2874]

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

[@alexhewitt1000]

THIS IS MY GRANDPA

[@sunritroykarmakar4406]

Alex Hewitt WOW

[@Myoo263]

why is he not memeing

[@em-ef8be]

Love you Paul 💞💕💓💞💖💘

[@dayswillburn777]

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

[@justinwinn01]

I like this man

[@kodeine222]

paul hewitt is my favorite teacher

[@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

[@salimk5518]

the most amazing teacher

[@darshanikumari5573]

Woow ..actually very nice..

[@cbsk341]

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

[@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?

[@mrvlhs]

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

[@kungfukiddie7332]

legend!

[@azadkhachatrian4474]

loving all the sarcasm in the comments

[@DedicatedCinema]

What grade is this for?

[@taymabekawi5271]

so amazing lecture 😍😍😍😍😍

[@mishfishy7645]

Physics daddy

[@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.

[@vinaydeshpande3643]

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

[@rrekaj13]

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

[@varunnurab]

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

[@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?

[@SmartWentCrazy]

This guys series is great!

[@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.

[@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.

[@AdrianVrabie]

So how come we never see a green sun?

[@angelicabaroso2154]

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

[@dsanzo]

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

[@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.

[@some_one_2_3]

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

[@pushpamsingh3870]

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

[@cwliias]

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

[@Retrograde_cat]

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

[@ActiveStorage]

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

[@cecariah0263]

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

[@xanecrown4545]

alter the composition of the atmosphere and get your wish

[@misswhiplashish]

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

[@kylefer]

This guys awesome.

[@ModestMuslimah15]

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

[@wownoob1234567890]

I love this guy lol

[@Hajeh22]

This guy reminds me so much of John C. McGinley

[@dosvecesj3222]

Loved the book...

[@wazer7693]

reallY ?? u so lucky!!

[@alexandriaboire5164]

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

[@btirador]

Teach my class please

[@chenmaluto]

I want him to be my teacher. :)

[@karenepic]

@kapullas haha

[@LionDusty]

HC gang?

[@Bike4life5]

That was beautiful.

[@IceCregon]

BE MY TEACHER PLZ!

[@jaymcd84]

YESSSSSS!

[@wazer7693]

u stupid

[@carmenjohnson9138]

Beautiful

[@dianakris14]

I really learned a lot.... :D

[@grzegorz16100]

That is what bible says!!!

[@kokkosbollful]

e=mc^2 its all i know

[@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?

[@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.

[@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

[@kapullas]

Sky is blue because God wanted to.

[@sandsnakesinmypants]

paul hewitt words: gang, honey, "yee!", check your neighbor, begins with... ends with...