Telephone thermogram

Telephone thermogram

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Credit: DR. ARTHUR TUCKER/SCIENCE PHOTO LIBRARY

Caption: 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.

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Keywords: cellular telephone, communication, communications, communications technology, head, heat sensing, mobile, mobile telephone, technological communication, telephone, thermogram, thermogram of, woman

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