I do not want to teach the right wording in radar technology here.
We say for convenience the radar beams is reflected .
Exactely the radar beam is not actually reflected by the target (car)
but the car itself (all metal pieces/metallised plastic) is re-radiating the
microwave radiation.So the car itself is turned into an antenna.
This is why it is so difficult to cut the ''radiation'' echoed from
a target , unless one is willing to spend millions of dollars, like DOD
with its project ''skunkworks''.
In any case , even the stealth plane is not 100 % invisible ,
just it shows a reduced RCS ,radar cross section .
In the case of the laser the term reflected is more than appropriate.