AP EAMCET · PHYSICS · Waves and Sound
On getting reflected at a surface, the intensity of sound is found to be decreased by \(20 \%\). If \(A\) be the amplitude of the incident sound waves, then the amplitude of reflected sound waves is
- A \(\frac{4}{5} \mathrm{~A}\)
- B \(\frac{2}{\sqrt{5}} A\)
- C \(\frac{\sqrt{2}}{5} A\)
- D \(\frac{1}{\sqrt{5}} A\)
Answer & Solution
Correct Answer
(B) \(\frac{2}{\sqrt{5}} A\)
Step-by-step Solution
Detailed explanation
Intensity of sound wave is directly proportional to the amplitude (A).…
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