[问答题]
Water waves having parallel crests 2.5 ctig0w- fjpi5 (6ck3 ftm apart passka8,lh69kqs0(zdf nvd rv d07 g/ pbs- through two openings 5.0 cm apart in a board. At a point 2.0 m beyond the board, at what angle relative to the “straightdv g0k8z n,hpa(ql6rd0 v/s sk fd9-7b-through” direction would there be little or no wave action?
