Which waves are used in sonography?

Microwaves

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Infrared rays

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Radio rays

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Ultrasonic rays

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Solution

The correct option is A Ultrasonic rays
Ultrasound imaging is also termed as the ultrasound scanning or sonography, This technique uses the small probe along with the gel placed on the skin. The sound waves of very high frequency (Ultrasonic sound) are sent into the body via gel using the probes to obtain the images of body parts.

Therefore, the sonography or ultrasonic scanning uses the Ultrasonic rays.

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(a) Arrange the following radiations in the order of their increasing wavelength :

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