What is the Doppler Effect? | Neil deGrasse Tyson Explains...
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- Опубліковано 8 чер 2024
- What is the Doppler Effect? On this explainer, Neil deGrasse Tyson and comic co-host Chuck Nice break down this famous phenomenon in the electromagnetic spectrum and how we use it in both science and our daily lives.
What’s the sound of a car zooming by? We explore the change in frequency with distance. Find out how this effect applies to light and what “redshift” is. What do we learn from a Doppler shift? Learn about how the radar speed guns that traffic cops use work and possibly how to get yourself out of a speeding ticket. Discover the many ways we use the Doppler Effect every day!
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Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up!
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0:00 - Introduction
0:30 - History of the Doppler Effect
1:49 - Wave Crests
3:45 - Nyoom
6:25 - Light Waves
7:33 - What Does The Doppler Shift Measure?
8:26 - Radar Guns
11:17 - Doppler Radar
12:52 - Redshift
16:08 - Closing Notes - Наука та технологія
NYEEEOOOWW
Aha! ive seen another dark verson of that meme. with a plane and uh, lets just say its a set of skyskrapers
So does this hold up with Speedy Gonzales and the Roadrunner? Don’t think the coyote gets the same effect as he’s interrupted by midair followed by a crash!
Someone else asked the question, does the Doppler effect work in water? Like, the sonar returns of a submarine?
Fabulous impersonation there Dr Tyson!
Can you please tell him to explain all this stuff on a peace of paper please? Because when he speaks that way it is not clear in my mind
A friend of mine said he understood the Doppler Effect perfectly. He changed his tune when I told him to run it past me.
Im a little upset that this is the first time hearing this joke
🙄
Nice one
😂
@@KiingDa3rd I apologise for not making it up sooner! I'll do better before the next time!
I have a lot of respect for Chuck. He’s brings a perfect mix of comedy and continuity, he’s able to make things relatable and entertaining for us. It’s not an easy job to be able to grasp all the concepts he does and then turn them into timely jokes that are actually funny
Well said!
Perfect ting and yang , makes it’s easy to understand
Agreed
@@Frogingscope A bit correction. Yin and Yang.
You, pretty much saying: he's actually funny. I think everyone knew. He's definitely great at his job. Thank you for your comedy Lord Chuck.
What do we want? Neil imitating the Doppler effect!
When do we want it? NYEEEOOOWW!
Excellent.
I love how he doesn't care about popularity it's more of education and still standing strong to his beliefs.. My favorite teacher and role model to all the youth that he can reach 💜
This channel never disappoints!
We’re flattered!
100% Agree ❗️
As soon Dr. Neil made the doppler sound effect with his voice, i looked at Chuck's face and it was like we knew both what to say "The MEME". AHAHA
Always an excellent scientific educator Dr. Neil is.
My ears heard this when I was a child but I could not have explained it till now.
Listened from the side of a freeway when cars were travelling past at high speeds. I waited a long time for that explanation.
Thank you!
My brothers made that sound frequently.
He can also speak in Donald Duck.
Wow! Tell him to tell Donald we said hi!
Now we need an explainer video about the vector principle!
Thanks for another video!!
Thanks for commenting!
You two are as entertaining as the car talk guys were, and the names of your shows rhyme. Coincidence? No matter, I love this show and learn so much while cracking up laughing right along with you!
Good point! I loved Car Talk as well.
crest crunch and crest stretch are insights that only Lord Chuck could make.
I'm gonna steal this
Another awesome, ROFL and educational StarTalk episode! :D
Glad to hear it :)
Me: "Oh I know what the Doppler effect is. I don't need to watch this...."
Also me: **watching with fascination because StarTalk 'splainers are the best**
😻
The problem with "I know this" is more often than not, you really don't... I don't mean you, I include myself but I'm not posh enough to use "one knows".
Given an object emitting a sounds at frequency x, moving a velocity v, heading in the direction v, situated at vector p relative to you. Can you predict the sound frequency change for you? Only if you can do that do you understand the Doppler Effect.
Science is hard and bridging the gap between an ad hoc understanding and actual science is surprisingly enlightening and definitely worth the effort.
@@davidmurphy563 Yes! I can predict the sound! It goes NYEEEOOOWW!
I always wonder who taught Neil, how he learned how to teach in such a entertaining way.
Carl Sagan
@@kairKash funny actually, when i posted this I immediately looked it up. I see where he gets it!
@@HopDavid Nevertheless he's often said he looked up to Sagan as an inspiration.
I don't know by who, but man... was he a good teacher.
@@fiusionmaster3241 time to look up who influenced Carl Sagan haha
Been fun learning from you all my life
Thank you !
The pleasure has been ours.
Never in my dreams could I have imagined I could reach out like this as a kid watching; now with technology it’s possible absolutely stunning to me
Astronomy was my first choice as a carrier in fifth grade well sorta reached it by writing a book about The sun lol
Solar Independent Utility Systems Manual
Never reached anyone yet but maybe with this technology I can overcome this as well !
Btw how are you liking the new photos from the new Webb telescope
I seen the very first images they released; absolutely mind blowing awesomeness and sharing everything with my family as they appear
But again thank you for all the knowledge as it really opened my brain to the universe and went on to utilize its photons lol
Very best wishes to you !
Hi Neil,
Have you ever done a Startalk about the reason that we can see the sun and a less than full moon at the same time? Someone recently asked me about this, and while I think I understand the situation, I could not adequately explain it.
Thanks for keeping us educated.
I’m sure I saw that in a vsauce video! I think it’s called the moon terminator illusion 🤔
ua-cam.com/video/AQ5vty8f9Xc/v-deo.html
Crash course astronomy, highly recommend
@@eugenio1203 yup. The terminator line is the line between daylight and night, especially on celestial bodies with no atmosphere to blur that line
I remember him explaining that after explaining something else and it was near the end of the video but I think it's a topic that deserves its own explainer video
This was great. I knew about the Doppler effect, and I was curious if it had a effect on light waves. Neil described it perfectly. I was also curious about red shift and blue shift, and now I know. Thank you so much for this video, it exceeded my expectations.
True for waves.
So if sun suddenly started to "fly" towards us, would it change colours? (If its some speed but not a speed of light)? From white as it is to... blue? :) etc..!
So glad it was of value to you!
@@MrRichieHK I imagine it would slightly, I would think it's too close for a blue shift to really take effect before other thing got really weird and catastrophic
@@StarTalk that's what I love about you Neil, you want to be famous, but not for personal gain. But to advance scientific thought in everyone you reach. For that I applaud you. I'm a blue collar worker who has always had an interest in astronomy since I was a kid. You have shown me more about the universe and astrophysics than I would have ever figured out on my own. I'm even getting into quantum physics, and picking apart relativity. All I have is a highschool education, but with your help, I know there is no limit to what we can know
Good stuff. Thank you. Dr. Tyson, you are so good at explaining things. Chuck, thanks for the questions, rephrasing and the laughter. 😊
No
I was thinking about this for the first time in years today, and boom there's a video about it in my feed. Perfect timing.
The algorithm knows ALL!
This channel is always feeding my curiosity.
Amazing work!
Greetings from Brazil 🇧🇷
I love when chuck says. You got some splaining to do !
this was probably one of the all time greatest explainer videos from star talk in my opinion>
Top marks Chuck. As a lay person you always stay close to the information. A real science appreciater
This was excellent. Great explanation.
I love your voice Neil I could sit and listen to it all day
NNNNNNYYYYEEEEEEOOOOOOOOWWWWW!!!! YOU GUYS TOGETHER ON STAR TALK IS PURE EPICNESS!!!
It would be nice if you added visuals to explain some of the concepts covered in this series.
Thank you for your feedback!
We learned about the Doppler effect, red shift, blue shift etc. in science class, but it's super interesting to hear how Neil explains it.
Thank you Dr. Tyson and Chuck! Fun as usual 🤗
Glad you enjoyed it!
Yes 👍 Chuck is back!!!
That's why a tornado signature shows different colours touching since it measures the wind going away from you and toward you, showing circulation.
love the show. lotso love from South Africa
I knew that that sound neil makes will be in this explainer
It was one of the first things I noticed at the racetrack when I was a young kid and my parents were on the nhra circuit
I LOVE this show so much, and always learn something!! Thank you!!!
We’re so glad :)
That was really good fellows.
The coincidence of listening to this episode while driving a Freightliner Cascadia with driver assistance features like the exact distance a car is, and how fast they are going was truly a lovely experience 😆👍
So RAM (radar absorbent material) used by the military, tends to be an iron silicate suspended in a bonding agent. Besides being expensive to get it also adds a lot of weight to the objects coated with it.
Hello, another video on time dilation would be amazing :)
Or you could just watch this one and change the playback speed to 0.25
I'm currently obsessed with time dilation and light cones
they need more time
Yess we have 1 master formulae..
+- up +- down....
Loved the derivations😀😀
Love you Chuck
Hi you guys 🤗
It was interesting to hear about the Redshift...,, 😉 I won't be here when the 2 Galaxys collide to see it go blue, but, it's nice to know that it will happen as you say. Now, I noticed you missed one little segment about the Doppler Effect or your "Dopplershift" if you are inside that car an the sounds you hear will always remain the same until it slows down to come to a stop or it changes speed to go a bit faster. You didn't address that part 🤔 Why not? It's important to know also 😌
Love these with you so, so much young man, thanks!
The man just breaks down the complicated. I wish he thought 💭 me Physics in College,.. Seriously
Interesting 🧐
Hey chuck and Neil can you do a video clip about you personal take on the tv series “The Orville” and aside from the main comedic side of the show did they capture any real representation of what space travel could be like?
And now you now how to fight a speeding ticket in court. Another very interesting video.
Thanks, Neil Tyson.
Standing right next to the track at Michigan International Speedway, the doppler effect is astonishing. Also one's eyes cannot focus on an object passing at 200+ MPH.
We know the Doppler Effect. We are here to see the Tyson-Chuck effect. Love this show. 💕Red Pill. Matrix Crew. Trinity and Neo
Neil's thoughts are so profound they create the doppler effect when they pass.
Everyone should should learn something new every day, if it's getting late and you haven't yet hit star talk before you sleep!🤓
Agreed!
The higher pitch is easier to amplifie. It’s from the resonance of the motor the whole train is essentially a resonator box. Like a tornado whistles. The low end frequency comes later. Or the natural sound of the train. I learned Doppler effect from state troopers in grade school and the radar gun.
This is not true at all your not hearing amplitude or a amplifier. Sound waves moves in a 360 degrees and each wave then also will Absorb, reflect, rarefaction etc and move in another 360 degrees. what you are confusing is sound presence with amplitude. Sound doesn’t have to be amplified to hear it. Sound waves are just sound pressure which creates it own air mass so it’s pressure that builds up in your ears. Something being higher or lower doesn’t make amplitude easier or harder it just gives you a greater presence. Which is considered loudness
The cause of the Dopler Effect is that sound travels at the same speed though a given medium, no matter how fast the source of the sound is moving. The speed of the source adds or decreases energy to the wave and since the wave cannot increase in speed, the energy change is seen in the change of frequency.
Red shift is not cause by the distance changing due to expansion. Red shift is cause by the speed of the source, gravity and the medium that the light travels in.
I have the NYEEEOOWWW as my ringtone for text messages.
Love it!
LOL!!! Chuck's face when Neil was making the car noises🤣🤣🤣 Tell Neil youv'e got to get down and walk along against the fence at the NASCR race to experience it. You've got to be sneaky though to time it right, and don't linger 'cuz they'll yell at you... been there, done that!
5:51 , I think it's time to introduce NEIL to FORMULA 1. He's be so excited with the SOUND of the cars. 🤩
Sheldon cooper wore a doppler effect costume in one of the TBBT episodes imitating the sound "Nyeeeoowww!" several times.
I would love to see an explainer on how nmri works, there are many videos on UA-cam but i still don't get it
I was about to comment about the meme, then Chuck brought it up
Neil, pls explain beacon of maracaibo. I'm from Indonesia and I'm a big fan of yours.
And chuck. Not forgetting you man.
Neil did you New Zealand is celebrating Matariki (Pleiades star cluster) this Friday? New Zealand's first time to have a public holiday for a indigenous festival.
Hey Chuck, if I’m not mistaken, the clip-clop sound is also part of the Doppler effect. Please ask Mr. Neil D T if this is the case. Thanks
THIS… IS… SP…..STARTALK
Excellent. I want to see the meme. Please add the link
What about a radar gun being used while it's raining? Do rain drops effect readings from the radar gun?
8:45 "When they are off to the side of the road, not all of your car's motion is towards the radar gun; only some of it". I used to notice that when a flying club air plane approaches me (standing on earth), I hear the pitch of its sound gradually decreasing even before it passes over my head. The pitch is pretty lower when it is directly above me, and decreases further as it gets away. Is the reason same? (like, the plane flying so high in the sky, the angle of depression is very significant and I get only the cos component of the doppler-increased frequency? And, the angle increases more and more as it approaches and cos(angle) gets gradually lower and lower ?
That NYEEEOOOWW is iconic
Jimi Hendrix utilizes the doppler effect in his famous Star Spangled Banner performance at Woodstock, where he emulates ambulance sirens. He unbends the strings while hammering with his fingers on the neck of the guitar back and forth, which bends the familiar siren notes down as happens in the Doppler effect. I think he also emulates it when he does the sound of bombs falling from the sky.
This phenomenon is also observable if you see a duck swimming in a pond. Every time the duck paddles its feet, it sends a wave outward. And because the duck is moving in a direction, you will see that the waves in front of the duck are closer to each other than behind the duck
Wow!
Why the shorter videos lately? I wanna learn.
By radar gun are you referring to the laser gun? Cause the radar one they can use while driving but the laser one they have to be stopped or it won't be accurate.
In Japan every car's speedometer is set to show an 8% higher speed than your actual one and the police never stops you unless you go 20+Km over the posted speed limit.
So, if you get a ticket you know for sure you were actually speeding.
Chuck is too damn smart. 90% of these theories and idea goes over my head lol
Best Halloween costume
Sir if universe is expanding both source and observer are moving with same speed, then relative velocity is zero then how does shift occurs.
I hope Neil gets to see the meme video Chuck mentioned. It was extra funny that its like the exact same sound.
🔥🔥🔥
😂I thought about that same meme as soon as I heard it
If you happen to be ON that moving train, the pitch of RR crossing bells will rise and fall.
Doppler shift was very obvious hearing the Blue Angels' jet engines scream when approaching, then rumble as they pass and move away at near 700 MPH.
🎯Thanks for help making the next generation of Black nerds look cool.👍🏿
💡Please interview Lonnie Johnson, the scientist, inventor and researcher working on next gen batteries.💦🔫
That’s an excellent idea! Thanks for the suggestion.
wow
We use the doppler effect in locating hidden transmitters.
can you talk about the magnetic field weakening?
3:45 for the NYOOOM sound
Niel not even knowing he made a wonderful meme sound
Christian Doppler was an Austrian physicist. Greetings from Mozart and Doppler's birthplace Salzburg
Ok so here is my story.
I got a ticket for speeding through a road on which there were men at work. Here in Italy on regular roads the limit for that specific circumstance is 30Kmh. If you are going faster than 40kmh the speed limit, your license gets revoked. Considering that they give you 5kmh bonus to compensate inaccuraccy of your car that limit would have been 75Kmh, at 76 my license would have been taken from me on the spot. I got exactly 75. Now that I know I was going faster then what the gun registered I feel even more lucky than I felt before. Definitely too close for comfort.
Doppler shift/effect equation only works for constant velocity right? If the object is accelerating that changes everything
🔥🔥🔥💪
Well this is funny, i just knew the Doppler Effect because of Sheldon in the The Big Bang Theory series. xD
The episode where he dressed as the Doppler Effect for Halloween and no one knew what he was, even with the sound effect. ua-cam.com/video/0rJPvGML9A0/v-deo.html
So if you paint a spaceship blue and have it come directly at you really fast, it becomes invisible?
Never realized this is the reason why it sounds like that!! and thanks for telling me I only have 5 billion years left to live!
Blue-shifting Andromeda!
So funny!😂😂
Neil at the NASCARS:
Spectating fan: * wearing backwards trucker hat, aggressively eating a corndog *
Neil in next seat: "did you know there are microphones all around the track picking up the sounds of the racecars?"
fan: "oh hey! youre the guy from that signpost meme! that was so funny man!"
regarding the light comment, isn't the speed of light constant? Why would there be an effect if the speed won't change?
Does the speed gun change if the policeman follows the car coming towards you and continues to track you as you leave his spot. I was told eons ago that cops allow you 5 miles per hour before taking after you. So if you were clocked at 65 in a 55 mph they would write a ticket for 60 mph. Just asking.
One of my favorite episodes of The Big bang theory is when Sheldon dresses up as the Doppler effect for Halloween
Lol. Same
Lol 2nd…sound waves compress as they get closer (higher pitch) and decompress as they go further away (lower pitch). It’s essential knowledge as a sound and music composer in my world!
Well, if the emitter of sound waves get closer, not the sound waves themselves.
@@homewall744 Yep, exactly-don’t want to get anyone up in arms-so, as the sound source gets closer! Lol