I’m going to assume that the F16 was on a military air route and wasn’t maneuvering inside airspace restricted to civilian aircraft... The C150 is obviously not at fault here as it is too slow to have come up on the F16,,, this is the equivalent of hitting a pedestrian in the crosswalk without even slowing down... My bet is that the F16 driver had his head inside the cockpit and not scanning outside.
No radar?....................
“inside airspace restricted to civilian aircraft”
There is no airspace restricted to civilian aircraft.