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Sound — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceSound2 Marks
Question
Give two practical applications of reflection of sound waves.
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Answer

  1. Reflection of sound is used to measure the distance and speed of underwater objects. This method is known as SONAR.
  2. Working of a stethoscope is also based on reflection of sound. In a stethoscope, the sound of the patient’s heartbeat reaches the doctor’s ear by multiple reflection of sound.

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