How does the lake reflect the building? How Does the Mirror Know what's there (again)

Answering a viewers question about how a lake can reflect a building that's not right next to it. Continuing from the previous "How does the mirror know what's behind it?" set of videos.
How can we see the reflection?
Previous Videos
How does the mirror know what's behind the paper. Explained! • How does the mirror kn...
How does the mirror know what's there? Explained (again): • How does the mirror kn...
Image link: pixabay.com/ph...