https://stolenhistory.net/threads/templ ... vers.6454/
talks about regular waves:
https://www.youtube.com/watch?v=g8GcMn7K0u4
and scalar waves:
https://www.youtube.com/watch?v=fMJrtheQfZw
The part that don't fit in my head yet is this piece of text:

I need help visualizing this somehow, I feel dumb, whatever, I just don't get this and something tells me I should
Thanks in advance..

 
