Advertisements
Advertisements
प्रश्न
What do you mean by reflection of sound? State one condition for the reflection of a sound wave. Name a device in which reflection of sound wave is used.
Advertisements
उत्तर
- The term "reflection of a sound wave" refers to the return of a sound wave in the same medium when it strikes a surface like a wall, metal sheet, plywood, etc.
- A reflecting surface's size needs to be greater than the sound wave's wavelength in order for a sound wave to reflect.
- A megaphone (also known as a speaking tube), a sound board, and an ear trumpet are examples of devices that exploit sound wave reflection.
APPEARS IN
संबंधित प्रश्न
Define amplitude term in relation to a wave.
Name the principle on which a soundboard works.
Name two sound absorbing materials (or objects) which can make our big room less echoey.
What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
Draw a labelled diagram to show the multiple reflections of sound in a part of the stethoscope tube.
Explain how the principle of echo is used by
The bat during its flight at
Draw a diagram representing a wave of amplitude 4 cm and wavelength 2 m. If the frequency of the wave is 150 Hz, calculate its velocity.
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 |
The direction of the incident sound, the direction of reflected sound, and the normal are in different Planes.
