
Which of the following types of waves is used in the SONAR device?
A. radio waves
B. audible sound waves
C. infrasonic waves
D. ultrasonic waves
Answer
485.7k+ views
Hint: In the Sound Navigation and Ranging instruments, we use waves which can penetrate to large distance or large depths in the water bodies. For this type of characteristics, the waves should have very high frequency.
Complete step by step solution:
SONAR is an abbreviation for Sound Navigation and Ranging. It is a technique in which we use sound waves to calculate distance. It is mostly used in marine vessels and submarines for navigation where a wave is emitted from the SONAR device and they hit the obstacle and reflect back towards the device which is able to calculate the distance using this information.
Now in order to obtain reliable information from the SONAR device, we need the waves which are able to penetrate through water bodies to large distances without getting absorbed on the way. This means that the waves should have a large amount of energy and energy is directly proportional to the frequency of the wave. This means that we need waves which have very high frequency.
The ultrasonic waves are most suitable because they have very high frequencies greater than 20kHz. They are most commonly used in SONAR devices as they do not get absorbed easily and perform reliable navigation and ranging. Hence the correct answer is option D.
Note: 1. The radio waves have very low frequencies and large wavelengths due to which they are unsuitable for SONAR application.
2. Infrasonic waves have very low frequencies less than 20Hz and also unsuitable for SONAR.
3. Audible sound waves have frequency between 20Hz and 20kHz and can defeat the purpose of SONAR since they are audible to human ears and can be detected easily when used in detecting enemy submarines.
Complete step by step solution:
SONAR is an abbreviation for Sound Navigation and Ranging. It is a technique in which we use sound waves to calculate distance. It is mostly used in marine vessels and submarines for navigation where a wave is emitted from the SONAR device and they hit the obstacle and reflect back towards the device which is able to calculate the distance using this information.
Now in order to obtain reliable information from the SONAR device, we need the waves which are able to penetrate through water bodies to large distances without getting absorbed on the way. This means that the waves should have a large amount of energy and energy is directly proportional to the frequency of the wave. This means that we need waves which have very high frequency.
The ultrasonic waves are most suitable because they have very high frequencies greater than 20kHz. They are most commonly used in SONAR devices as they do not get absorbed easily and perform reliable navigation and ranging. Hence the correct answer is option D.
Note: 1. The radio waves have very low frequencies and large wavelengths due to which they are unsuitable for SONAR application.
2. Infrasonic waves have very low frequencies less than 20Hz and also unsuitable for SONAR.
3. Audible sound waves have frequency between 20Hz and 20kHz and can defeat the purpose of SONAR since they are audible to human ears and can be detected easily when used in detecting enemy submarines.
Recently Updated Pages
Master Class 12 Economics: Engaging Questions & Answers for Success

Master Class 12 Maths: Engaging Questions & Answers for Success

Master Class 12 Biology: Engaging Questions & Answers for Success

Master Class 12 Physics: Engaging Questions & Answers for Success

Master Class 12 Business Studies: Engaging Questions & Answers for Success

Master Class 12 English: Engaging Questions & Answers for Success

Trending doubts
The probability that a leap year will have only 52 class 12 maths CBSE

Describe the poetic devices used in the poem Aunt Jennifers class 12 english CBSE

And such too is the grandeur of the dooms We have imagined class 12 english CBSE

What does the god that failed refer to class 12 english CBSE

Which country did Danny Casey play for class 12 english CBSE

Draw a labelled sketch of the human eye class 12 physics CBSE
