A) 1000
B) 10000
C) 10
D) 100
Correct Answer: D
Solution :
Let intensity of sound be land I' Loudness of sound initially \[{{\beta }_{1}}=10\log \left( \frac{I}{{{I}_{0}}} \right)\] Later, \[{{\beta }_{2}}=10\log \left( \frac{I'}{{{I}_{0}}} \right)\] Given, \[{{\beta }_{2}}-{{\beta }_{1}}=20\] \[\therefore \] \[20=10\log \left( \frac{I'}{I} \right)\] \[\therefore \] \[I'=100I\]
You need to login to perform this action.
You will be redirected in
3 sec
