The Doppler Effect: what does motion do to waves? 

the type of videos that no one hates: no annoying and loud intros no "hey guys" straight to the point and old most of them

I have a test tmrow. and instead of reading 10 pages. I look at a 3 min video that covers the whole thing. thank you sir.

anyone else's physics teacher send them here during quarantine

I realize that this is a very very old video, but I would like to state that this is very well made. It's informative and visually entertaining!

5 minutes ago, I didn't understand this at all. now I totally do

"Because you're standing in the middle of the road." LOL

This was probably, hands down, the best explanation I could've hoped for. Thank you.

Teacher: My brain: Nyoooooooom

shame there aren't more like these. useful for class

I really enjoyed your explanation of the Doppler Effect because you presented it with humor and concise and clear animation! Great job!

How strange it is that I was subscribed to Alt Shift X for years for the GoT content and a random google search to assist in an Astronomy course brought me here. The good new is Alt Shift was still pumping out quality and super-informative videos. Thank you kind sir.

8 years later this is still one of the best explanations, good job, great video!

are you tying to hypnotise me g

This helped me a lot thanks...but the ending was kind of depressing

The Doppler effect in radar works like this, the colour spectrum of visible light when an object is approaching towards you it will be red for example but green in the middle and blue when away. If everything in the radar is standing still it becomes noise. If an enemy aircraft is not moving in a direction where the Doppler effect is happening and moves into the right place, it can become one with the noise on the enemies radar and effectively disappear from their long range sight. I learned this in DCS World.

The animation has one flaw - the circles showing the wave propagation do not move with a car. A sound travels from the spot it was created, independently on how its source is moving.

today is halloween and I'm going as doppler effect, thanks for nice explaining

that was really cool. thank you

5 minutes ago: i understood nothing Now I am hypnotized and realise that I am nothing.

Super helpful! I've been staring at my textbook with a car and observer for about 10 min and had no idea what the waves meant, but your 3min explanation makes it easy to understand. Thanks!

This helped me a LOT. Thank you! We studied this in science class sometime this year, and I was reviewing for finals, and I found this. My teacher didn't do a very good job of explaining, but this short video helped greatly :D

Brilliantly explained!! The concept has become crystal clear to me now. Thank you so much.

who's here in quarantine doing online school -_-

I was looking for something like this - and this was fantastic. Thank you! (Hope you're still out there somewhere, doing great things).

Great visual explanation, thanks! I knew what the effect sounded like but didn't exactly understand how the phenomenon worked. This was very helpful! Excellent presentation :)

And now he does game of thrones videos!

this is one of the best explained videos ive seen. from visuals to text to the speaker. incredible.

This is the best explanation and much better than my high school teacher's did. Big thank to the creator because of this video I can understand how to derive the Doppler equation, how the motion can really affect the wavelength. I try to make my own explanation video, and I hope it's easy to understand

Awesome video! I always pull this video up when students have questions on the Doppler Effect. Your graphics and verbal explanation are so clear and quick! Thank you

I loved the video, very eloquently put and beautiful graphic work!

0:30-0:50 - I've heard about the concept before but now I finally understand it, that imagery made so much sense :)

I found this video when I searched for some explanation of wavelength and visible lights. I’m so happy that this video combines what I heard before, red shift and Big Bang, with what I’m learning now in college. Perfect!

I got something out of it! Thank you so much! I have a project in school and this really saved me :)

Consise, simple. What a great source of information. Thank you!

best video ever!!! I love how synthetic, informative and entertaining it is. Thank you so much!!!

I have a physics exam tomorrow and I'm so happy that my favorite GOT theory channel is also going to help me pass my class. Thank you!!!

I am going to use this video in my powerpoint presentation about waves for my 8th grade students. Thank you!

Hi. Thanks for this video, it is excellent and my students will benefit from the time and effort you have put it.

Awesome video! Short but teaches you well and easily. My first yr uni astronomy course teacher attached this vid for us to watch haha

thanks I have a physics test coming up - this video is the absolute best , straight to the point and a simple explanation so that everyone can understand

Please make more physics/science videos! I know your GoT vids must be more popular but your ability to produce succinct yet clear and intuitive explanations for scientific concepts is far more valuable in my opinion.

ahaha I like how at the ending actually said bye. You rarely hear that in these types of videos :P

Thanks for bringing up the car horn example. Its easier to understand when you know what to look for and actually pay attention to the sound. The sound doesnt sound the same the entire time, or you could actually hear the sound changing from high to low pitch when its in motion. The low pitch part, it actually sounds like its being drawn out or stretched due to the lower frequency.

I learnt so much...All my doubts were clarified. Thank you for the fantastic explanation.

Fun Fact: 90% of the views on this video are 8th grade Earth Science teachers

Just watching this for fun after a AltShiftX GoT binge. Cool stuff.

This is one of my favorites videos. I watch it again everytime I can

Great video. Watched other videos summarizing the Doppler Effect and this one was my favorite

Thanks, this was really helpful!

You have a gift to explain things. Excellent video. Can you please post video's explaining important concepts covered in AP Physics 1 and AP Physics 2 courses. A lot of students self study these subjects and will benefit tremendously.

This was a spectacular explanation that immediately changed my mood and perception towards the physics that I've been studying for the past 3 hours. Thank you!

you are helping many students sir, i love physics and thank you for this video sir..........

The last 5 seconds are the most adorable on this channel

who else came to watch this after Carson's new video?

uploaded on my birthday.... this is another point why i chose this vid thx for the help :)

I love this educational stuff. Obviously, don't stop the Song of Ice and Fire stuff, but please keep doing these educational videos.

Amazing, it actually makes alot of sense now. Thank you so much!

Been watching your got videos for a while and realised that you made this that we got showed in class Aswell :)

Subscribed... You deserve it me and my mum were racking our brains over this... nice explaining

My physics teacher used this to teach us the Doppler Effect, and coincidentally I’ve watched some of your other videos! Great stuff man!

Watching this 5 minutes before my physics exam And I actually understand it now so thanks

First year university student- this is the only thing that made me understand the Doppler effect for my Astronomy midterm :)

This might be the best teaching video on youtube. Thank you, you just saved me.

This is wonderfully done. I use it every year in my Earth and Space high school science class.

I was watching that episode of the big ban theory when I watched this in question of what the Doppler effect

I was in the library and had biophysics exam, and doppler effect was one of the subtopics which i had some difficulty to understand. For a short break, i just opened one of your game of thrones videos, and it was well narrated, so I checked your channel for more game of thrones stuff but found this which was quite well explained as well :)

This is a wonderful video. Very easy to understand, simple, and entertaining. I love it. Makes learning easier.

Brilliant animations and well-explained narration!

Great video, very well explained

i got a lot more than i expected out of that. very cool ending.

This explained everything so well i liked and subscribed just to appreciate the post 😫🤚

You've done really a very great job. Now it seems very easy. Thanks a lot.

dude I watch your game of thrones videos and saw this in class and you made both my mind is dead currently

This video is perfect for explaining the phenomenon to my class! Thanks so much!

By far, THE BEST explanation I've ever seen in my life! THANK YOU!

I learned a couple things, couldn't peel my eyes away. GREAT VIDEO!

the whole thing abt earth being lonely in a distant future just made me really depressed ngl

Rn I’m failing my Earth systems class. After this video, it made my grade go back up to an A. 👏👏👏

Damn that was an extremely well done explanation, I've been scouring the internet for a long time and never seen something so clear and concise.

Awesome. Will be using with my students as visuals are really helpful.

Great video, except for the Big Bang reference @ the begging and end of the video. Cheers

Thank you! You explained this much better than my professor with a strong Asian accent.

Thanks for making it easier to grasp with the visual examples

Awesome.. From not knowing doppler effect at all to understanding what it actually is and why it happens. Now i can explain others too. Thanks !

loved it! Fun and to the point!

oh yeah, helped tremendously.

This is the best explanation I have seen yet. Thank you for helping my students!

Best explanation I've listened to, been trying to understand this for a while.

Very Educational! thank you

Thank you Sir. This is amazing. I have my test tomorrow. Wish me luck.

i have seen endless videos about this topic TYSM this is the only one that helped me💞💞

I didn't understand earlier. But now, i understand all of it! Thanks for a good explanation.

Great Video

Thanks! This helps- ALOT!

This was brilliant! Short and sweet, and some nice applicable info too!

didnt even realize this was an alt shift x video at first. this guy does it all

0:23 wooow trippy :DD... sorry :D thank you for explanation :)

ALTUĞ GÜNEŞ'DEN GELDİK ADAM OLUN.BELKİ BİZ İNGİLİZCE BİLMİYOR OLABİLİRİZ AMA NO PROBLEM BİZİM İÇİN.SİZDEN DAHA İYİ GRAMMER BİLİYORUZ :D

Perfect. Crisp, clear, to the point. Thanks!