system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does the sun or light bleach the color out of colorful objects?
gpt
If you throw a blueberry at a window, it will bounce off. If you throw a rock at the window, the rock won't bounce and also the window will break. All of the pieces of the window are still there in a pile on the floor, but it's definitely not "a window" anymore.  The same happens to colorful objects, but the blueberry is regular light and the rock is UV. The UV breaks the molecules that gave the object its color. Now those molecules are in a pile on the floor.