Advertisements
Advertisements
प्रश्न
What type of waves are generated by SONAR device fixed to a fishing ship ?
विकल्प
water waves
radio waves
sound waves
infrared waves
उत्तर
SONAR uses ultrasonic sound waves.
(c) Sound waves.
APPEARS IN
संबंधित प्रश्न
A submarine emits a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m/s, how far away is the cliff?
How is ultrasound used for cleaning?
A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
Explain the term 'amplitude' of a wave. Draw the diagram of a wave and mark its amplitude on it.
How does the pitch of a sound depend on frequency ?
What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves ?
Explain the term 'pitch' of a sound. On what factor does the 'pitch' of a sound depend ?
Draw labelled diagrams to represent sound of (a) low pitch, and (b) high pitch, of the same loudness.
Write any three applications (or uses) of ultrasound.
Fill in the blank and explain.
To discover a sunken ship or objects deep inside the sea, ______ technology is used.
