Advertisements
Advertisements
प्रश्न
What are fishing boats?
Advertisements
उत्तर
These boats are provided with SONAR which stands for Sound Navigation and Ranging. The sound is the ultrasound which enables boatsmen to exactly pinpoint the location of fish in deep water. SONAR not only gives the distance but also the exact location of the prey.
संबंधित प्रश्न
Why are the ceilings of concert halls curved?
Define amplitude term in relation to a wave.
What is the shape of a soundboard kept behind the speaker on the stage of a big hall ?
What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
Explain how is the principle of echo used by
(a) The bat during its flight at night,
(b) The dolphin to locate small fish as its prey.
What is meant by echo depth sounding?
Explain why, the ceilings of concert halls are curved.
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.
