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absorbed absorption abstract animals antenna applications band beam biological body breast caused cells changes compared considered constant damage depends described determine device dielectric direct discussed distance door effects electric electromagnetic Electronics emissivity energy experiments exposed exposure factor field frequency give given hazards heat horn human increase indicates industrial infra-red intensity irradiation laser lens less levels light limit load London material maximum measurement metal method microwave ovens microwave radiation monitor Non-ionizing Radiation normal observed obtained occur operating oven pattern period Physics placed possible power density present produced protection pulsed range recorded References reflected region relative reported response rise safety sensitivity shown shows skin sphere standard Street surface Table temperature thermal tion tissue unit various wave wavelength