What do diffraction and refraction have in common?
They both involve interference.
They both involve wave interactions.
They both involve reflection.
They both involve construction.
Both diffraction and refraction have wave interactions in common. Both phenomena result from the interaction of waves with a boundary or obstacle. Diffraction occurs when waves encounter an obstacle or aperture and spread out or bend around it, while refraction occurs when waves change direction as they pass from one medium to another, due to a change in their speed. Both diffraction and refraction involve the bending or change in direction of waves due to their interaction with an external factor.
The correct answer is: They both involve wave interactions.
Diffraction and refraction are both phenomena related to the behavior of waves. Diffraction refers to the bending or spreading out of waves around obstacles or through openings. Refraction, on the other hand, refers to the bending of waves as they pass from one medium to another due to a change in their speed. Both of these phenomena involve the interaction of waves with their environment, making "wave interactions" the common similarity between diffraction and refraction.