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Question
What are fishing boats?
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Solution
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.
RELATED QUESTIONS
How is the frequency of a stretched string related it’s tension?
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 stethoscope ? Name the principle on which a stethoscope works.
Mention two properties of a wave, one property which varies and the other which remains constant when the wave passes from one medium to another.
Explain why, the ceilings of concert halls are curved.
What is mean by the reflection of sound?
Match the following:
| 1. | Stethoscope | a. | Repeated reflections |
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| 3. | SONAR | c. | Ultrasonic waves |
| 4. | Reverberation | d. | Speed of underwater objects |
