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प्रश्न
What are fishing boats?
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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
How is the frequency of a stretched string related it’s tension?
What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency?
Draw a labelled diagram to show the multiple reflections of sound in a part of the stethoscope tube.
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.
Write the approximate value of the speed of sound in water.
Why is an echo not heard when the distance between the source of sound and reflection body is less than 10 m?
Explain reflection at the boundary of a rarer medium.
