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Intensity level of sound whose intensity...

Intensity level of sound whose intensity is `10^(-8) W m^(-2)` is ….. dB

A

8

B

4

C

40

D

80

Text Solution

Verified by Experts

The correct Answer is:
C
Intensity level of intensity `10^(-8) ` watt/`m^(2)` is
L = 10` log" " (I)/(I_(0))`
= 10 ` lot (10^(-8))/(10^(-12)) = 10 log 10^(4)`
= 40 dB.
so correct choice is (c) .
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