1. which wave refracts?
a an ocean wave hitting a break wall
b a wave going around an obstruction
c an ocean wave approaching the shore at an angle
d a wave that ripples in a fountain

C. an ocean wave approaching the shore at an angle

Explanation:

In wave physics we can say that one of the main phenomena involving two-dimensional waves is refraction. The refraction of a wave occurs on the liquid surface, when a wave passes from one medium of propagation to another, that is, it passes from a region of greater depth to another region of less depth, or the other way around. In this case, we can conclude that the option that best exemplifies a situation where the refraction of a wave occurs is "an ocean wave approaching the shore at an angle".

In refraction, the frequency of a wave is the frequency of the generating source, that is, it remains constant. The speed and the wavelength are directly proportional, this can be verified through the equation: v = λf. The deviation in the direction of propagation of a wave will only occur if it falls on the separation surface between the media with an inclination, that is, if it falls obliquely.

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