Advertisements
Advertisements
प्रश्न
Explain the working and application of a sonar.
Advertisements
उत्तर
SONAR is an acronym for Sound Navigation And Ranging. It is an acoustic device used to measure the depth, direction, and speed of under-water objects such as submarines and ship wrecks with the help of ultrasounds. It is also used to measure the depth of seas and oceans.
A beam of ultrasonic sound is produced and transmitted by the transducer (it is a device that produces ultrasonic sound) of the SONAR, which travels through sea water. The echo produced by the reflection of this ultrasonic sound is detected and recorded by the detector, which is converted into electrical signals. The distance (d) of the under-water object is calculated from the time (t) taken by the echo to return with speed (v) is given by 2d = v × t. This method of measuring distance is also known as ‘echo-ranging’.
संबंधित प्रश्न
Give two practical applications of reflection of sound waves.
Name the characteristic of sound which can distinguish between the 'notes' (musical sounds) played on a flute and a sitar (both the notes having the same pitch and loudness).
What type of scans are used these days to monitor the growth of developing baby in the uterus of the mother ?
What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves ?
Give one use of ultrasound in industry and one in hospitals.
Which of the two produces ultrasonic waves : porpoise or whale ?
In SONAR we use:
What type of waves are generated by SONAR device fixed to a fishing ship ?
Fill in the blank and explain.
To discover a sunken ship or objects deep inside the sea, ______ technology is used.
The depth of an ocean can be determined by ______.
