8
AssignmentMultiple Choice

Unit Test

Question 8 • BHS-Physics B-CR

Ocean waves are moving east toward a small island. Which statement is correct about the behavior of the waves?

Answer
A
The waves will diffract around the island and converge on the opposite side.
B
The waves will diffract toward the north and south, leaving the east side perfectly calm.
C
Waves passing the island edge will continue to travel east without changing directions.
D
The first waves will deflect back toward the west and cancel out the other oncoming waves.

Explanation

Waves bend and spread around the edges of an obstacle, a behavior called diffraction. So waves moving east can curve around both sides of the island and spread into the region behind it. Choice A, that the waves diffract around the island and converge on the opposite side, is the correct statement; the east side would not be perfectly calm.

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