Motorcycle helmet visors can be made from photochromic plastic. This plastic is clear at night or indoors, but darkens in bright sunlight to reduce glare for the rider.
The photochromic plastic reacts to ultraviolet (UV) radiation.
Suggest one benefit of the visor responding to ultraviolet radiation rather than visible light.
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.