Earth satellite use the detectors of which electromagnetic waves ?

Options

A. IR-waves
B. X-ray
C. UR-rays
D. Radio waves

Answer

To determine which electromagnetic waves are used by Earth satellites, we can analyze the options provided and the characteristics of each type of wave.

### Step-by-Step Solution:

1. **Understanding Electromagnetic Waves**:
- Electromagnetic waves include a range of wavelengths, from radio waves to gamma rays. Each type of wave has different properties and applications.

2. **Analyzing the Options**:
- **Option 1: Infrared (IR) Waves**: Infrared waves are commonly used in satellite technology for various applications, including thermal imaging and monitoring Earth's surface temperature.
- **Option 2: X-rays**: X-rays are typically used in medical imaging and not commonly used for Earth observation from satellites.
- **Option 3: Ultraviolet (UV) Rays**: While UV rays can be detected by satellites, they are not primarily used for Earth observation.
- **Option 4: Radio Waves**: Radio waves are used for communication and some remote sensing applications, but they are not the primary means of detecting surface features.

3. **Identifying the Most Commonly Used Waves**:
- Most Earth observation satellites are equipped with instruments that detect visible light and infrared waves. Infrared waves are particularly useful because they can provide information about temperature and vegetation health.

4. **Conclusion**:
- Based on the analysis, the most appropriate answer is that Earth satellites primarily use detectors for **Infrared (IR) Waves**.

### Final Answer:
Earth satellites use the detectors of **Infrared (IR) Waves**.

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