Have you ever had an argument with a bee if that flower is red? Or a blue-wale how Mozart sounds for him? Are waves on a body of water an abstraction?
But your obviously a troll so i stop here.
So, yes, waves are an abstraction, how can you not see it? When you look at the sea you don't see waves, you see colors moving around and then when you try to describe what you see, you define the concept of "waves" and come to the conclusion that these are waves you are looking at. But that happens entirely inside your mind. Waves is a concept like frequency.
>>Red light has relatively long waves, around 700 nm long
Those 700 nm or ~428274 gigahertz is the frequency of red (as a human eye normally sees color) light waves.
https://scied.ucar.edu/learning-zone/atmosphere/visible-ligh...
>>Frequency is a measure of how often a given event repeats itself. In physics, it is commonly used to describe waves.
https://www.translatorscafe.com/unit-converter/en/frequency-...
>>Frequency is the number of occurrences of a repeating event per unit of time
https://en.wikipedia.org/wiki/Frequency
You can scroll down and you will find "Light" and "Sound"
This is "our" visible spectrum, to the left increased frequency to the right increased wavelength:
https://en.wikipedia.org/wiki/Frequency#/media/File:EM_spect...
>the concept of "waves" and come to the conclusion that these are waves you are looking at.
It's not a concept but:
>>a wave is a disturbance or variation which travels through a medium.
https://www.acs.psu.edu/drussell/demos/waves-intro/waves-int...
And stop with you wannabe philosophical BS, it sounds just uneducated even borderline clownish.
You really don't know how science works do you? Bye roger, i am out.