B.P.S.C. B.A.O. 2024
Measuring instruments and scales SONAR technology uses –
aX-rays
bInfrared waves
cMicrowaves
dNone of the above✓ Correct
Explanation
SONAR (Sound Navigation and Ranging) is a technology used for ocean exploration and mapping. In this technique, ultrasonic waves are used. Ultrasonic waves are high-frequency sound waves. Their frequency is greater than 20 kHz (kilohertz).
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