system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: how does taking a photo of an old painting damage it?

Often in museums / galleries there are signs to not take photos of paintings or sculptures etc because it will cause damage. Why?
gpt
The camera isn’t the problem it’s the flash. Flash photography emits a huge burst of light which is a particle. Over time, light can change the way pigment in paints look, this is why museums use low UV offset lighting.