السؤال 398

Which of the following bands has the lowest maximum permissible exposure for RF safety?

3.5 MHz
50 MHzالإجابة الصحيحة
440 MHz
1296 MHz

الشرح

The permitted exposure limits are lowest in the range from about 30 to 300 MHz, because the human body absorbs RF energy most efficiently there. Of the frequencies offered, 50 MHz falls inside that most restrictive range, while 3.5 MHz, 440 MHz and 1296 MHz all have higher permitted limits.

الشرح

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