Boy measuring his temperature

Bildnummer 11862436
Boy measuring his temperature
MODEL RELEASED. Strip thermometer. Boy using a strip thermometer to measure his temperature from his forehead. His temperature is displayed by the green area,which in this case shows 38 degrees Celsius. This indicates that he has a slight fever: normal body temperature is a degree lower than this. The cells in the strip each contain liquid crystals in a tight helix. The crystals are designed so that they expand and begin to reflect light at a specific activation temperature. Each cell's crystals have a slightly different activation temperature. Fevers can be reduced with drugs,but most are short-lived and harmless. Skin thermometers are less accurate than mercury or digital types
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Andrew Lambert Photography
Bildgröße: 4885 px × 3609 px
Modell-Rechte: vorhanden
Eigentums-Rechte: nicht erforderlich
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