Visual display unit research. Physicist using a spectroradiometer to analyse the luminance of a VDU (visual display unit,also known as a computer monitor). Spectroradiometers measure the range of electromagnetic radiation emitted by an energy source. Electromagnetic radiation takes the form of visible light,ultraviolet light,infrared light,microwaves,radio waves,gamma rays and X-rays. There have been concerns that electromagnetic radiation from some electrical devices may cause negative health effects. Although these are unproven,it is necessary to check that the energy output is at a level considered safe for users. Photographed at the National Physical Laboratory in Teddington,UK | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Brookes, Andrew / National Physical Laboratory |
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