Physics
Sonar makes use of:
- Infrasonic sound
- Ultrasound
- Supersonic sound
- Light
Sound
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Answer
Ultrasound
Reason — In SONAR (abbreviated form of sound navigation and ranging), to detect and find the distance of objects under water, ultrasound is used.
Exercise 8(B) — Long Answer Type -type short-answer
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Related Questions
The sound of frequency less than 20 Hz is called :
- supersonic
- infrasonic
- ultrasonic
- ultrasound
The properties of ultrasound that make it useful, are:
- High power and high speed
- High power and good directivity
- High frequency and high speed
- High frequency and bending around the objects
Assertion (A) : Sound waves cannot travel through vacuum.
Reason (R) : Sound travels in the form of longitudinal waves.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Assertion (A) : The speed of sound is maximum in gases when compared with speed in solids.
Reason (R) : The speed of sound in a medium depends on the density of medium.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false