Stethoscope works on which principle ?

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Q: 10 (SSC/0)
Stethoscope works on which principle ?

question_subject: 

Science

question_exam: 

SSC

stats: 

0,28,17,9,3,28,5

keywords: 

{'stethoscope': [1, 0, 1, 0], 'reflection': [1, 1, 2, 19], 'sound': [4, 3, 10, 15], 'principle': [0, 0, 0, 1], 'current': [0, 0, 0, 3], 'light': [16, 4, 34, 62], 'conversion': [3, 1, 3, 6]}

Option 1: Conversion of current into sound - This principle is not related to how a stethoscope works. A stethoscope does not convert current into sound.

Option 2: Conversion of sound into current - This principle is also not applicable to a stethoscope. A stethoscope does not convert sound into current.

Option 3: Reflection of sound - This is the correct principle. A stethoscope works by transmitting sound waves from the body to the listener`s ears. The sound waves are reflected by internal body structures, such as the heart or lungs, and amplified through the stethoscope`s tubing to the listener`s ears.

Option 4: Reflection of light - This principle is unrelated to a stethoscope. A stethoscope does not involve the reflection of light.

In conclusion, the correct principle on which a stethoscope works is the reflection of sound.