The larger the contrast ratio, the brighter the information appears against a dark background. All 3M GlareGuard computer filters improve the contrast by minimizing first surface glare through the use of an anti-reflection coating. In addition, all models uniformly filter out ambient light using a neutral density filter applied to the glass. It isn't as energetic as the type of radiation used by nuclear power plants. All devices requiring electric power will generate ELF and VLF radiation.
Magnetic fields pass through most materials, including concrete, steel, and lead.
The greatest reduction in H-field emission is achieved by wrapping the internal electrical components with a very expensive material called mu metal. All 3M GlareGuard filters are tested by an independent laboratory that specializes in compliance testing. Insignificant amounts of UV are emitted by a computer monitor and are related to the emission spectrum of the phosphor and pose no known health concern for office workers. All glass provides excellent blockage of UV light. UV light is the invisible region of the spectrum just beyond the violet end of the visible region of electromagnetic radiation.