Why do some museums and temples refuse to take pictures?

Because in museums, these precious calligraphy and paintings and works of art are usually placed in a dark position, because the ink color of the text and the acquired color have been destroyed for a long time. For precious cultural relics, strong light is the most terrible, and light can make them change color or even change color, so museums and temples are usually not allowed to take pictures. If you take pictures in museums and temples, you have to use a flash because of the dark external environment, so the strong light of the flash will seriously damage the cultural relics.