Reflection of Sound Wave
Experiment
Conclusion:
- The angle of incidence, i is equal to the angle of reflection, r.
- Sound waves obey the law of reflection. That is, the angle of incidence is equal to the angle of reflection.
Q & A
Why hard plywood is used?
A hard surface is a good sound reflector. Hard plywood is used so that only very little energy is lost during the reflection.
Q & A
Why mechanical stopwatch is used as a source of the sound?
Because its sound is not loud enough to be heard directly by the observer.
Q & A
Why cardboard tube is used?
The cardboard tube is used to help to direct the incident and reflected sound waves.
Q & A
Why softwood is used?
The softwood can absorb any sound from the stopwatch and prevent it from reaching the observer.