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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
Why are the ceilings of concert halls curved?
State the use of echo by a bat, dolphin and fisherman.
Name the principle on which a soundboard works.
What is a megaphone ? Name the principle on which a megaphone works.
Draw a labelled diagram to show the multiple reflections of sound in a part of the stethoscope tube.
How are bats able to fly in the dark?
Explain reflection at the boundary of a rarer medium.
Write short notes on reflection of sound waves from plane and curved surfaces.
