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प्रश्न
How is an ultrasound scan for fetus (unborn baby) better than X-ray ?
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उत्तर
An ultrasound scan for fetus is better than X-rays because X-rays can damage the delicate body cells of the fetus.
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संबंधित प्रश्न
How is ultrasound used for cleaning?
Define the 'frequency' and 'time-period' of a wave. What is the relation between the two?
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 ?
Write the full name of 'SONAR'.
Fill in the blank with suitable word :
Quality of sound depends on ........................
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Explain why, if we strike a table lightly, we hear a soft sound but if we hit the table hard, a loud sound is heard.
Define the following terms : (a) Echolocation (b) Echocardiography, and (c) Ultrasonography.
Expand the abbreviation of the term SONAR.
