00:00Tiny glass beads are attached to the fabric, which celebrities wear as scarves.
00:05Now, it looks like a regular accessory, but if someone takes a photo with a flash, the bright light hits
00:12the beads.
00:13Each one has a reflective coating at the back, which bounces the light straight back at the camera lens.
00:19And the scarves shine so bright that the camera changes its exposure to match, while everything around it stays dark.
00:27This ruins the photo and keeps the celebrity mostly invisible unless it's altered in Photoshop.
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