Stethoscope Working Principle: Sound Reflection
A stethoscope is a medical instrument used for listening to internal body sounds, such as heartbeats and breathing.
Core Principle Explained
The working principle of an acoustic stethoscope is fundamentally based on the reflection of sound.
- Sound waves generated within the body travel through the chest piece.
- These waves are directed up the flexible tubing via multiple reflections off the inner surfaces of the tube.
- The sound then travels to the earpieces, allowing the listener to hear the internal body sounds clearly.
Evaluating Other Options
- Option 1 (Conversion to electric signals): This describes electronic stethoscopes, not the basic principle of acoustic ones.
- Option 2 (Conversion to light): Stethoscopes work with sound waves, not light.
- Option 3 (Absorption of high-frequency sound): Stethoscopes aim to transmit sound efficiently, not absorb it.
Therefore, the primary mechanism enabling a stethoscope's function is the reflection of sound waves.
Important Questions from Reflection and Refraction
Which of the following statement is correct?
I. Refraction is due to the change in the speed of light when it enters from one transparent medium to another.
II. The refractive index of water is 1.33.
The focal length of the eye lens increases when eye muscles:
Myopia is also known as ______.
Part of the eye which controls the light entering, is called as
Which defect of vision is corrected using cylindrical lenses in spectacles ?
