‘SONAR’ emits which of the following waves Radio waves Micro waves Ultrasonic waves Gamma rays

Options

A. Radio waves
B. Micro waves
C. Ultrasonic waves
D. Gamma rays

Answer

To determine which type of waves are emitted by SONAR, we can analyze the options provided:

1. **Understanding SONAR**: SONAR stands for Sound Navigation and Ranging. It is a technique that uses sound propagation to navigate, communicate, or detect objects underwater.

2. **Types of Waves**: We need to evaluate the options given:
- **Radio Waves**: These are electromagnetic waves used for communication, but they are not typically used in SONAR.
- **Microwaves**: These are also electromagnetic waves, primarily used for cooking and certain communication technologies, not for SONAR.
- **Ultrasonic Waves**: These are sound waves with frequencies above the audible range for humans (above 20 kHz). SONAR utilizes ultrasonic waves to detect objects underwater.
- **Gamma Rays**: These are high-energy electromagnetic waves and are not related to SONAR.

3. **Conclusion**: Given that SONAR operates using sound waves, specifically ultrasonic waves, the correct answer is **Ultrasonic waves**.

Final Answer: **Ultrasonic waves**

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