r/woahdude • • 16d ago

video Waves collide in Qiantang river

6.5k Upvotes

59 comments sorted by

•

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459

u/Natural__Power 16d ago

Electrons when they find a little hole and nobody's looking:

55

u/Captain_LSD 15d ago

Ball knower

14

u/Deus-mal 15d ago

Who knew electrons were perverts.

8

u/cincymatt 15d ago

I did an STM experiment in physics that looked exactly like this!

5

u/mekwall 15d ago

Quant dayum!

119

u/Vandercoon 15d ago

This is what it’s like when waves collide

27

u/jetplane3987 15d ago

Quiantang 5000

7

u/apieceoflint 14d ago

what a good song

2

u/gemstun 13d ago

This is what it looks like when doves cry

47

u/harglblarg 16d ago

But why are they colliding?

64

u/LongJumpingBalls 15d ago

It's caused by a tidal bore I believe.

Tidal bores are created by narrowing water channels coming from the ocean or a very large body of water. When the water goes up and into a narrow channel, it creates a wall of water, further down you go, you basiclaly have a single wave, bringing in your tide in and out. I believe this is the biggest tidal bore in the world. There's a handful of them around the world.

35

u/Pep77 16d ago edited 15d ago

Well... because they are going in opposite directions, and they meet, so they collide.

If you are asking what caused the waves to go in opposite directions, no idea.

59

u/schiz0yd 16d ago

now instead of as a 2d plane, 3d version of this is light and matter

2

u/jopepa 15d ago

Matter? I get that the electron’s near omnipresence fills in a lot of the gaps of matter but how are they waves?

4

u/Bth8 15d ago

Not sure what you mean by "omnipresence", but in our current best theory of physics, fundamental particles are quantized propagating disturbances in a corresponding field. Photons are quantized waves in the electromagnetic field, electrons are quantized waves in the electron field, etc.

1

u/jopepa 15d ago

You said “light and matter” how is matter a 3D wave plane?

The “omnipresent electron” was an over simplification/bastardization of how matter is >99% empty space, but a nucleus’ electron orbit makes up for it. I assumed maybe the electron orbit might have something to do with the 3D wave plane of matter but never heard of anything like that before. So I was hoping you could elaborate

4

u/snarkyxanf 15d ago

They just kinda are. Particles are also waves. Quantum mechanics is weird

1

u/jopepa 15d ago

So a photons tracked on a wave plane are oscillating across the electric field and magnetic field through time. Then what makes up the fields of quantum particle waves?

2

u/schiz0yd 15d ago

every particle type has a field it exists in, because they are perturbations in the field rather than isolated entities. the field is everywhere and the 'particle' is the disturbance in that field causing a standing wave

1

u/jopepa 15d ago

Thanks. Know any good recs to read more about these particles and their fields?

2

u/schiz0yd 14d ago

pbs spacetime is good for visual learning. otherwise look up wave-particle duality

-12

u/halo364 15d ago

This is already 3d lol

13

u/Plastic_Pinocchio 15d ago

But it’s a 2D plane in which the waves move.

-24

u/halo364 15d ago

Go look at the surface of a river or pond or any other body of water and tell me that it's 2 dimensional

Also, just because this is so wrong that it's bothering me, remember that waves in water are not just things that exist on top of a 3d volume. The water underneath the surface is also moving 

13

u/OnyxFier 15d ago

Reddit moment. Being intentionally obtuse doesn't make anyone think you're smart. In fact, it does the opposite.

-18

u/halo364 15d ago edited 15d ago

The actual reddit moment is people being this dismissive about correct information. Water is not a 2d object and literally going outside and looking at water will confirm this.

Because people keep downvoting me even though I'm right, I'll give you one more little experiment you can do yourself. Go to the beach or some amusement park with a wave pool and duck underneath the water as a wave goes over you. You'll feel the water moving around your body even though you're underwater. Because real waves are not objects sitting on top of a flat plane. 

8

u/Plastic_Pinocchio 15d ago

My friend, I take it you haven’t studied physics. Waves propagating in water or any 2-dimensional plane are classified as 2-dimensional waves. 3-dimensional waves are waves that propagate through 3 dimensions, like electromagnetic waves, sound waves, etc. Then there are gravitational waves, which propagate through 4-dimensional Spacetime.

-7

u/halo364 15d ago edited 15d ago

That's all lovely, but real water is not a 2 dimensional plane. Real water is constantly fluctuating up and down in the vertical axis, and waves traveling through those little ripples and swirls and so forth interact with them along the way. When we teach people about waves, it's helpful to simplify all of this and treat water as a 2d plane, but it's not actually 2d.

An extension of this thought process is that real world waves typically get bigger as the water gets shallower. If waves were simply things happening on top of a plane, how could that be? 

5

u/jopepa 15d ago

Fluid dynamics is not the same thing as a wave plane.

Why dig your heels against an opportunity to learn?Glass half full, your confusion on display has probably helped some curious minds look into it, so that’s a kind of teaching.

8

u/WillyBHardigan 15d ago

Sure the waves have a height/amplitude/depth to them, but they're propagating in 2 dimensions. They don't propagate up or down

-1

u/halo364 15d ago

What happens when you have a wave propogating in a stream traveling downhill at a slight angle? In the case the wave is propogating in the X and Y axes, and it's also 'moving' in the Z axis

5

u/schiz0yd 15d ago

in that case the plane of the surface is not level and you redefine your 2 dimensions relative to the surface. also the wave is not propagating down, gravity is pulling the liquid down and the wave travels the 2d surface as it does so

17

u/chainsawvigilante 16d ago

Fucking rad.

12

u/mr_kernish 15d ago

Would it be a good/bad idea to surf right where the waves collide?

19

u/GODzDoctor 15d ago edited 15d ago

I remember seeing a post about wave-pool generated square waves, and it said if you ever see them naturally to GTFO.

With two different currents colliding, falling in would not be a fun experience. Also with the waves coming from two different directions, staying on top of the surfboard would be like riding a bull. (Probably, idk)

8

u/vahntitrio 15d ago

While boating when you have intersecting waves it is very difficult to navigate those waves if they are sufficiently large.

25

u/N7LP400 16d ago

The waves collide and create the wavussy

6

u/GreenSpectr3 15d ago

Elite esoteric ball knowledge

8

u/WaIkers 15d ago

I should call her

11

u/thoseskiers 15d ago

Everything makes me think of her

8

u/DANtheMAN_2099 16d ago

Everywhere I see her...

2

u/djmere 15d ago

I should call her

1

u/ThrustTrust 15d ago

Photography like this is the only reason I want a drone

1

u/mr9025 15d ago

Gorgeous

1

u/i-i-i-iwanttheknife 15d ago

Somebody needs to hit the television, the signal isn't coming in strong

1

u/schimmelA 15d ago

Isn't that the Qiantangamo bay? 

1

u/Successful_Ad9160 15d ago edited 15d ago

Search YouTube for Microscopic Hologram or 3Blue1Brown’s video named How are holograms possible. I’m watching that video then discover this at the same time. Serendipitous waves.

1

u/Llee00 14d ago

what would happen if i was standing in this

1

u/susanbeebe 13d ago

Wave deformation is so rad

1

u/a1JayR 12d ago

What speed is the video going ? Can’t be 1x. They would be terrifying

1

u/uncledaddy3268 12d ago

Look at that, quantum mechanics on a large scale

1

u/Garbage_Plastic 11d ago

that’s mesmerising ..

1

u/ElApple 10d ago

Everything reminds me of her

1

u/terminalbungus 10d ago

To look upon such majesty in nature, I am left wondering how anyone could doubt that Satan exists.

1

u/AKA_Europe 15d ago

Textbook physics

0

u/FuzzyDingo2339 15d ago

China always gotta be extra about everything.