Mobile telephone use. Thermogram of a woman using a mobile or cellular telephone showing the variation in temperature. The temperature scale runs from red (warmest),through yellow,green and cyan,to blue (coldest). Thermography is a technique for visualising the temperature of surfaces by recording their emission of long- wavelength infrared radiation. This heat radiation is detected electronically. Mobile telephones use low-power radio signals to transmit a signal calls to an antenna in the user's local area or cell. The call will then be connected to another mobile telephone,or,if necessary,a conventional telephone exchange | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Tucker, Dr. Arthur |
Taille de l’image : | 2987 px × 3541 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |