Question

SONAR uses [A] Electromagnetic waves [C] Gamma rays [B] Ultrasonic waves [D] X-rays​

Answer 1

Answer:

ultrasonic waves.sonar is based on echo principle

Answer 2

Answer:

[B] Ultrasonic waves.

Explanation:

Ultrasound and not any other sound wave are used in SONAR for two reasons. Firstly, ultrasound has a higher frequency and hence higher energy than audible sound waves, so they can move easily underwater and are not stopped by small obstacles.

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