IL = 10 log (I/I
0
)
where I
0
= 10
-12
W/m
2
-18.0 = 10 log (I/10
-12
)
log (I/10
-12
) = -1.8
I/10
-12
= 0.0158 I = 1.58X10
-14
W/m
2
Return to Self Test 4