Physics, 17.05.2021 21:30 Kurlyash

Water waves having parallel crests 4.9 cm apart pass through two openings 7.9 cm apart in a board. At a point 3.0 m beyond the board, at what angle(s) O (0° < < 90°) relative to the "straight-through" direction would
there be little or no wave action?

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Water waves having parallel crests 4.9 cm apart pass through two openings 7.9 cm apart in a board. A...