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प्रश्न
What type of waves are generated by SONAR device fixed to a fishing ship ?
पर्याय
water waves
radio waves
sound waves
infrared waves
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उत्तर
SONAR uses ultrasonic sound waves.
(c) Sound waves.
संबंधित प्रश्न
Explain the term 'amplitude' of a wave. Draw the diagram of a wave and mark its amplitude on it.
Define the 'frequency' and 'time-period' of a wave. What is the relation between the two?
Name the unit used to measure the loudness of sound. Also write its symbol.
How does the pitch of a sound depend on frequency ?
How is an ultrasound scan for fetus (unborn baby) better than X-ray ?
What name is given to sound waves of frequencies higher than 20 kHz ?
What is meant by the 'loudness' of sound ? On what factor does the loudness of a sound depend ?
Draw labelled diagrams to represent (a) soft sound, and (b) loud sound, of the same frequency.
Draw labelled diagrams to represent sound of (a) low pitch, and (b) high pitch, of the same loudness.
Give one use of ultrasound in industry and one in hospitals.
