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प्रश्न
What type of waves are generated by SONAR device fixed to a fishing ship ?
विकल्प
water waves
radio waves
sound waves
infrared waves
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उत्तर
SONAR uses ultrasonic sound waves.
(c) Sound waves.
संबंधित प्रश्न
Fill in the blank with suitable word .
Sound waves are caused by ...................
Name the three characteristics of sound.
What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves ?
What happens to the pitch of a sound if its frequency increases ?
What name is given to sound waves of frequencies higher than 20 kHz ?
Fill in the blank with suitable word :
Loudness of sound depends on .....................
Draw labelled diagrams to represent sound of (a) low pitch, and (b) high pitch, of the same loudness.
What is the range of frequencies associated with (a) infrasound (b) audible sound, and (c) ultrasound ?
Write any three applications (or uses) of ultrasound.
The depth of an ocean can be determined by ______.
