Which part of electromagnetic spectrum is used in operating a RADAR ?

Answer

### Step-by-Step Solution:

1. **Understanding Radar Functionality**:
- Radar systems are used to detect objects such as planes, birds, or other flying entities. They work by emitting waves and analyzing the waves that bounce back from the objects.

2. **Identifying Wavelength Requirements**:
- To effectively detect these objects, the wavelength of the waves used must be in the order of centimeters. This is crucial because the size of the objects being detected is comparable to the wavelength.

3. **Examining the Electromagnetic Spectrum**:
- The electromagnetic spectrum includes various types of waves, ranging from radio waves to gamma rays. Each type of wave has a different wavelength.

4. **Finding the Appropriate Region in the Spectrum**:
- Within the electromagnetic spectrum, we need to focus on the region where the wavelengths are in the order of centimeters. This leads us to the microwave region.

5. **Conclusion**:
- The part of the electromagnetic spectrum used in operating a radar is the **microwave region**. Microwaves have wavelengths that are suitable for detecting objects at distances typical for radar applications.