The sound of a jet engine is given as $120 \mathrm{~dB}$. What is the intensity of the jet sound wave?
A) $0.6 \mathrm{~W} / \mathrm{m}^{2}$
B) $0.8 \mathrm{~W} / \mathrm{m}^{2}$
C) $1.0 \mathrm{~W} / \mathrm{m}^{2}$
D) $0.2 \mathrm{~W} / \mathrm{m}^{2}$
E) $0.4 \mathrm{~W} / \mathrm{m}^{2}$

Question

Quizplus · Accepted Answer

The intensity level in decibels is given by $ L = 10 \log_{10} \left( \frac{I}{I_0} \right) $, where $ I_0 = 10^{-12} \mathrm{~W/m}^2 $. For $ L = 120 \mathrm{~dB} $, solving gives $ I = 1.0 \mathrm{~W/m}^2 $.

The Sound of a Jet Engine Is Given As 120 dB120 \mathrm{~dB}120 dB

The Sound of a Jet Engine Is Given As $120 \mathrm{~dB}$