Question

The chemical reaction in photochromatic lens

Answer 1

Glass photochromic lenses contain silver halide crystals embedded in a glass substrate. ... When a photochromic dye is exposed to UV radiation, a chemical bond is broken. The molecule then rearranges into a species that absorbs at longer wavelengths in the visible region, causing the lensto darken.

Answer 2

Helloo!!

Early photochromic glasses were usually made of glass and contained small crystals of silver halides that darkened when exposed to light, just like old photographic films