In your hose example, there actually is a speed of sound delay. I refer you a third time to the slow motion slinky drops.
I've just told you there is a delay for everything. It includes your slinky and every other thing, including how light propogates.
It's all waves in all forms and all have to start with an action. An energy. The action and energy applied is what makes the difference in what we see or hear or feel.
In terms of light, it's a super high frequency of vibration.
What you hear is dependent on energy at lower frequencies of vibration which is picked up by your ear drum and hammer.
You feel the effects of both of these, dependent on the energy applied and the proximity it's applied in, to yourself.
There are no scattered particles as such, in the terms you people hang onto but there is scattered light to your vision, which is only to your vision which is only a fan out of light, just like sound fans out.
As for your particles that just take undecided routes in your space, for instance. It's hogwash. It's garbage science. It's simply made up nonsense that caters for the fantasy of space in many respects.
Your life is dependent on waveform no matter where, or what or how, in anything - absolutely anything that moves, however fast or slow to your perception.
Our minds have been warped to hell with a lot of this stuff, because this stuff given out is to fit an agenda. To keep us from actually seeing the real truth.
We are easily fooled because we were born very primitive, with 2 crap eyes and crap ears...but, they work for us in our every day lives and we can aid ourselves by magnifying to a certain degree; distances.
There is no magic involved. It's basic.
It only becomes complicated because people are astounded by the so called complexity of machines of all descriptions and do not have the inclination or the mental capacity to actually see how they work, yet the reality of it all is basic.
To understand it all, you basically have to start from square one. There's no magic. There's no unforseen forces if people can understand the basics.
The best way to understand the basics is to experiment on a nice clear lake or pond, using all kind of objects from stones to model boats, etc.
Once you do this, you can look into why light and sound are exactly the same thing. It's simply down to energy and frequency of vibration, which has to create sound before we can see the light. It's as simple as that.
No special particles and all the rest of the gunk that gets spewed.
Learn this and you will soon realise the extent of the lies you have grown up accepting as truth.
One more thing.
All matter is connected. All matter. There are no seperate particles of matter, anywhere.
Again, look at your lake. What you see in that lake, is what is happening in your atmosphere. You simply are in your own lake, only less dense but it's all connected.