The intensity of sound wave while passing through an elastic medium falls down by 10% as it covers one meter distance through the medium. If the initial intensity of the sound wave was 100 decibels, its value after it has passed through 3 meter thickness of the medium will be
Text Solution
Verified by ExpertsThe correct answer is:
B
After passing the 3 meter intensity is given by
So, the intensity is 72.9 decibel.
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