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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 two factors on which the speed of a wave travelling in a medium depends.
Write the approximate value of the speed of sound in air.
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 Reflection at curved surfaces.
A sound wave whose frequency is 5000 Hz travels in air and then hits the water surface. The ratio of its wavelengths in water and air is ______.
Write short notes on reflection of sound waves from plane and curved surfaces.
