An automatic welding helmet features a protective visor made of a photochromic material. During welding, a high-intensity electric arc is struck, which emits a wide range of electromagnetic radiation. The photochromic visor is designed to darken only when exposed to ultraviolet (UV) radiation.
Suggest one benefit of the visor responding to ultraviolet radiation rather than visible light in a workshop environment.
25 exam-style questions on Edexcel GCSE Physics 5.4 Uses and dangers of EM radiation. Each one has a worked solution and a mark scheme showing where the marks go.