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rA=4 m
rB=2 m
ditanya: TIB=.....?
jawab
TIB=TIA - 10 log (r2/r1)²
= 60 - 10 log (4/2)²
= 60 - 10 log 2²
= 60 - 20. 0,3
= 60 - 6
= 54 dB
TIA = 60 dB
rB = 4 m
Io = 10⁻¹²
Jawaban di JPEG