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Chapter 12 Class 9 - Sound (Deleted)

NCERT Question 12 - Chapter 12 Class 9 - Sound (Deleted)

Last updated at June 26, 2019 by

Give two practical applications of reflection of sound waves.

Answer 

Application of reflection of sound waves

 

  • Ceilings of Cinema halls are Curved

 

This is to ensure that sound after reflection reaches all parts of hall

 

  • Stethoscope

 

It is used by doctors to measure heartbeat 

Doctor is able to hear sound due to multiple reflection of sound in stethoscope

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