what is sonar...........
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a system for detection of objects under water
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SONAR IS A MACHINE WHICH IS USED TO DETECT OBJECTS UNDERWATER AND FOR CALCULATING THEIR SPEED. ITS FULL FORM IS SOUND NAVIGATION AND RANGING.
WORKING OF SONAR :
SONAR CONSISTS OF A TRANSMITTER AND A DETECTOR AND IS INSTALLED IN A BOAT OR A SHIP. THE TRANSMITTER PRODUCES AND TRANSMITS ULTRASONIC WAVES. THESE WAVES TRAVEL THROUGH WATER AND AFTER STRIKING THE OBJECT ON SEABED, GET REFLECTED BACK AND ARE SENSED BY THE DETECTOR. THE DETECTOR CONVERTS THE ULTRASONIC WAVES INTO ELECTRICAL SIGNALS WHICH ARE APPROXIMATELY INTERPRETED. THE DISTANCE OF THE OBJECT THAT REFLECTED THE SOUND WAVE CAN BE CALCULATED BY KNOWING THE SPEED OF SOUND IN WATER AND THE TIME INTERVAL BETWEEN THE TRANSMISSION AND RECEPTION OF THE ULTRASOUND.
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WORKING OF SONAR :
SONAR CONSISTS OF A TRANSMITTER AND A DETECTOR AND IS INSTALLED IN A BOAT OR A SHIP. THE TRANSMITTER PRODUCES AND TRANSMITS ULTRASONIC WAVES. THESE WAVES TRAVEL THROUGH WATER AND AFTER STRIKING THE OBJECT ON SEABED, GET REFLECTED BACK AND ARE SENSED BY THE DETECTOR. THE DETECTOR CONVERTS THE ULTRASONIC WAVES INTO ELECTRICAL SIGNALS WHICH ARE APPROXIMATELY INTERPRETED. THE DISTANCE OF THE OBJECT THAT REFLECTED THE SOUND WAVE CAN BE CALCULATED BY KNOWING THE SPEED OF SOUND IN WATER AND THE TIME INTERVAL BETWEEN THE TRANSMISSION AND RECEPTION OF THE ULTRASOUND.
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