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प्रश्न
Define the following terms : (a) Echolocation (b) Echocardiography, and (c) Ultrasonography.
उत्तर
(i) Echolocation: It is the method used by some animals to locate the objects by hearing the echoes of their ultrasonic squeaks. This method is used by bats and dolphins in finding their way and detecting their prey.
(ii) Echocardiography is a method used to investigate the action of the heart by using ultrasound waves.
(iii) Ultrasonography is a technique of obtaining pictures of internal organs of the body by using echoes of ultrasound pulses.
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