Okay. Thanks for finally saying you don't have applicable credentials/education to even begin to disprove this understood optical situation.
I have no interest in photography or physics at my age because they things don't put food on the table in the real world.
Then maybe you shouldn't take a contrarian position on fundamental shit you aren't interested in?
TBF, I barely understand these things from undergrad classes and don't work in directly applicable fields. But when I don't work in a field, call me crazy, I tend to defer to settled optical/mathematical/physical principles, a global longterm scientific/mathematical consensus, and basic common sense. Optics ultimately comes down to math and physics. Engineering/Manufactuing enables the math and physics to play out.
Nothing wrong with something not making sense to you. But everyone needs to acknowledge their gaps in education/information before calling bullshit on easily explained phenomena. Skepiticism is healthy, but needs to be rational. Defaulting to calling bullshit isn't rational, it's intellectually lazy (and often emotionally comforting).
I don't really know how Radar works, but common sense tells me the dataset and worldwide/longterm application of the physical principles means it does in fact work.
“Any sufficiently advanced technology is indistinguishable from magic.”