How the Doppler effect works
Вставка
- Опубліковано 28 вер 2024
- Imagine you are standing in the middle of a road and a car is coming towards you. The driver sounds the horn so that nothing unpleasant happens, and you hear the horn very loudly, at a high pitch, and step out of the way. However, as the car moves away from you, the sound of the horn seems to change even though the source itself does not.
The reason behind this phenomenon can be explained with the Doppler effect. Before going into detailed questions such as “How does Doppler effect work” or “what is the Doppler shift”, let us start by answering the most basic question: "What is the Doppler effect?"
Sheldon, the genius from The Big Bang Theory, defines the Doppler effect as “It is the apparent change in the frequency of a wave caused by relative motion between the source of the wave and the observer.” The definition can be hard to grasp but to simplify it, think of something that is emitting waves whether a star emitting light or a police siren emitting sound.
We see the Doppler effect happening with the movement of the thing that is emitting waves. The Doppler effect gets more interesting when you consider its applications. Doppler effect equation is used in so many areas from Doppler radars in astronomy to dynamic real-time path planning in robotics.
If you want to learn more about this seemingly simple but important concept, this video can help you better understand the phenomenon as it explains the Doppler effect visually. Enjoy!
To get the latest science and technology news, subscribe to our newsletter “The Blueprint” at bit.ly/3BDdN5e
⚙ Want to know more about the latest tech and innovations? Don’t Miss Out!
*SUBSCRIBE & HIT THE BELL* 👉bit.ly/SubscribeNowIE
funny how 90% of the people watching this are indian neet/jee aspirants. like if you're one of them.
Who said that they r indian?
From Srilanka 👋
Not at all. I'm just an 8th std student
Nice visuals and sound, but factually incorrect. At 1.26 video says that frequency is higher because observer is closer to the bug. Not the case - it only depends on the fact that the bug is moving towards the observer, distance apart makes no difference!
Really interested. Narrated very well. 💖
Does this work for heat too?
The more close we get to the source, more the temperature we feel.
I think no. Because in that case there's no frequency aspect involved, only the amplitude(magnitude of heat) varies with distance. While Doppler effect is primarily a phenomenon of frequency change.
You gotta ask yourself - what's carrying the heat? If we're talking distant hot objects like stars, heat is carried by photons, and there is actually a manifestation of the doppler effect called a blueshift which essentially means the original photon's wavelength moves towards the more energetic (blue) part of the spectrum if the object emitting it is moving towards you. So that would actually give you more heat because each individual photon would carry more energy. However perhaps a more common phenomenon in astronomy is redshift, the opposite effect where the observed photons are of a longer wavelength and are less energetic because distant stars are moving away from us due to the expansion of the universe
heat is particle and sound is wave. that is a big difference
@@bruh321xyz4 Heat is a particle? How so?
Great Explanation...👍👍
I love this channel!
Great explanation thank u
Now I got it 👍🏻
I wish I watched the video before answering the poll question 😆
Thanks DuDe..!
Is this your own voice, you use in your videos?
Or this is an AI voice?
He didnt replied.
But he is liking and Hearting other comments.
Pls @Interesting Engineering
Reply.
Not an AI voice. Better than that 😉
human voice
@@dronzerdanks7163 I didn't really looks like its human voice, IMO its AI
But he is not telling, so we cant judge him.
Tq...
Am from Bangalore
Why do the sound waves compress when the observer is near? What causes the compression?
That wasn't explained properly in the video. The sound waves don't "compress" just because the observer is near. That would be ridiculous to think that just simply because the sound waves don't have a brain to know when someone is approaching lol. Let me explain it in a better way: As the observer moves closer to the object that's producing the sound waves, the observer will be more sensitive to high frequencies. As the observer moves further away from the object producing the sound waves, the observer will be less sensitive to high frequencies. This is because the wavelength of a high frequency is extremely short in comparison to wave lengths of lower frequencies.
To sum it up, the sound waves that are being produced don't change. The only thing that changes is the way our ears perceive the frequencies we are able to hear based on our current distance from the object. Simple as that.
Not sure how a sound phenomenon can be applied in space when there are no air molecules to to compress/rarefy.
That's not just a sound phenomenon
electromagnetic radiation (i.e. visible light, radio waves, x-rays, etc) does not require a medium to travel through like sound does, which is classified as a mechanical wave.
Electromagnetic waves also shows Doppler's effect
If light can show Interference phenomenon which we can easily observe in day to day life and interference is property of mechanical wave then why not electromagnetic wave (light ) shows Doppler effect
2:55 is that Jontron on the left??
wth are double stars?
They're called binary stars that are gravitationally bound to each other.
So basically you would hear it faster when ur closer?
No, the video does make it seem that way tho but doppler effect does not depend on distance…
You hear sound (or see light) that has a higher pitch (shorter wavelength) when the thing making the sound/light is moving towards you and you hear sound (or see light) that has a lower pitch (longer wavelength) when the thing emitting the sound/light is moving away from you…
Doppler effect is about the change in distance (the velocity), not the distance itself
cool
Interesting 😃
Becoming financially stable requires patience,dedication and good investment never depend on your salary alone
You all know that stock is not stable now and it at risk, investing in crypto(Bitcoin, ether etc) is the best now because with the right broker you can invest and make lots of profits
Earning investing in forex and cryptocurrency trading has been my greatest wish since I have been scammed and lost a lot severally,I came across a recommendation to Mr Liam Michael so I tried it out to see how works...I'm convinced now since I received my withdrawal
Reach out to Mr Liam Michael *+ 1_2_0_1_3_7_9_4_6_8_7_
Via WhatsApp
The tides of the money market and the wealthy has always revolved around investing smartly,taking risks with critical predictions and careful analysis. Cryptocurrency trading is at the forefront of modern investment and this is why you need an experienced trader like Mr Michael with his exceptional trading skills would help anyone who is confused on how to go about making profits from the crypto world.
CBSD
Change in frequency between the source and observer, we observe the doppler effect
Love from Karnataka😍😍
Yo Mee too
Mysuru,😮 Bangaluru 😮
Me too
Pretty interesting. I guess I always knew about this in my youth, but couldn't define what took place when a siren was coming and going. Especially multiple ones off in the distance. Air raid sirens, from movies like The War of the Worlds and H.G. Wells The Time Machine, I found, were the ultimate sound fascination. Weird :P Great upload. Quite educational
Q: can the Doppler effect be noted if the Observer is not static, but rather in motion, relative to the wave source in motion as well?
A: Yes. e.g., inside a fast moving vehicle being overcome by low flying jet aircraft. The sound waves from the approaching jet would be short and compressed, (blue shifted) and perceived as a higher frequency relative to the source. As the jet quickly passes over, the wave length would become stretched, (red shifted) and perceived at a lower frequency.
So, People before 1842 heared sound miles away
What will happen if there are two sources of sound at different distance from you?
That's pretty interesting question
Then interference will happen between the two sounds, and depending on their displacement from you, and if for e.g both sounds are exactly same, the both sounds can cancel each other, or even be heard louder!
Frankly....6th view...
Oh for heaven sake, almost nobody caught the error in the explanation of the Doppler effect. The sound waves are shifted to higher or lower frequency because the speed of sound is constant and velocity of the source is adding or subtracting because to the location where the previous wave was emitted and the waves are therefore closer or further away each other.
Better explanation than a school teacher.straight to the point
Like it keep it up
A Doppler is a 2 liter bottle of wine. It also has the effect of slowing down sounds. Especially the users speech. I would have liked to start this with:"Here in Austria a Doppler,..." but the science Nerd was from here.
Can I share this video clip in my Telegram Channel ?
I'll mention the source .
Bro called it soccer 😭
It’s so hard to watch the video because of the repeating tone 😐😐
😘👍
One of my favorite examples to explain the Doppler effect to my friends is a fighter jet traveling at mach 0.8
High Tide/emergency?
Without ears there would be no noise.
EEEEEEeeeyyyooowwwww • • • •
Post more physics related videos. Phenomenons, facts...
My brain 🧠 can’t understand
That's pretty funny
Useful video. Thank u
Light is a wave and so is sound, however light is a photon so has no mass but sound is a wave say through air and so it has mass.
I understand that if you travel in a car with the headlights on the speed of light is not the speed of light plus the car speed but if the car could travel as some astronomic speed it would simply compress the wave and increase the frequency and therefore the colour temperature would change
Is this true of sound also.
Obviously the Doppler affect is the fact that the waves are being compressed then stretched as the sound souces moves away.
What I want to know however is the speed of sound the same if the source of the sound is stationary or in the case of a carn horn is it the speed of sound plus the speed of the car?????
That was an interesting way to explain Dopplers Effect. Thanks
Love this 😍
Luv luv❤
i read about this in library, in 1994.
in the last clip of an f1 car why the apparent frequency is low when the car is approaching the observer and high when receding from the observer shouldn't it be the other way round?
We can detect the speed of a vehicle.It's another advantage of Dopler Effect.
Was the sound track of the F1 car at the end played backward?
oooh so thats why i wont see 2 lightnings at the same time when ill go towards them from side
But why do the waves compress or elongate?
This is a really a good vid thanks ☺️
Funny thing that it was a presentation of my friend for an assignment 🤣
Got drop on the right timeline 😂😂
Great explanation
ah it makes sense now
Amazing ❤️❤️❤️❤️
Good video ❤
Please tell, where and how do you make these video footages??
Whats the effect called, that for example.. you are walking and the houses near you "move" but the mountains at far stay always at the same place.
(english is not my first language, sorry)
Parallax
perspective
He man, please reply.
Is this your own voice, you use in your videos?
Or this is an AI voice?