To protect boats from wave action inside a harbor, the optimal angle is discussed in terms of wave interference.
To determine the angle at which boats inside a harbor are most protected against wave action, we need to consider wave interference.
When waves enter the harbor opening, they diffract and interfere. The boats inside the harbor are most protected when the diffracted waves cancel each other out.
Therefore, the boats inside the harbor are most protected against wave action at an angle of 90 degrees to the incident direction.
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