Advertisements
Advertisements
Question
Advertisements
Solution
Experiment to demonstrate the reflection of sound:
1. Take two identical pipes, as shown in Fig. You can make the pipes using chart paper. The length of the pipes should be sufficiently long as shown.
2. Arrange them on a table near a wall.
3. Keep a clock near the open end of one of the pipes and try to hear the sound of the clock through the other pipe.
4. Adjust the position of the pipes so that you can best hear the sound of the clock.
Conclusion: Sound waves pass down the first tube and are reflected from the smooth surface of the wall. After reflection, they enter the second tube and are received by the ear at the other end. If you measure the angle of incidence and angle of reflection, you will notice that they are equal.
APPEARS IN
RELATED QUESTIONS
Why are the ceilings of concert halls curved?
Displacement distance graph of two sound waves A and B, travelling in a medium, are as shown in the diagram below.
Study the two sound waves and compare their:
1) Amplitudes
2) Wavelengths
What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
Write the approximate value of the speed of sound in air.
Why will an echo not be heard when the distance between the source of the sound and the reflecting surface is 10 m?
Explain why, the ceilings of concert halls are curved.
Write short notes on reflection of sound waves from plane and curved surfaces.
Match the following:
| 1. | Stethoscope | a. | Repeated reflections |
| 2. | Echogram | b. | Multiple reflections |
| 3. | SONAR | c. | Ultrasonic waves |
| 4. | Reverberation | d. | Speed of underwater objects |
