The correct answer to the question is:
A. Sound bending around a door
Explanation:
1. Diffraction of waves occurs when waves encounter an obstacle or opening that causes them to bend around it. This bending or spreading out of waves is a characteristic feature of diffraction.
2. In the context of the options provided:
- Sound bending around a door is a clear example of diffraction. When sound waves encounter a doorway, they diffract around the edges of the door, leading to the phenomenon of sound bending. This bending allows us to hear sound even when the direct line of sight is blocked by the door.
3. The other options do not directly relate to diffraction:
- Seeing yourself in a mirror is related to reflection of light, not diffraction.
- Two sounds canceling each other out refers to destructive interference, not diffraction.
- Something looking bent under water is due to refraction, not diffraction.
Therefore, option A, sound bending around a door, is caused by the diffraction of waves.
