^Micro waves

(a) Produced by special vacuum tubes like klystrons & magnetrons. Due to their shorter wavelengths the microwaves don’t spread or bend around the corners of any obstacle coming in their way, hence can be transmitted as beam signals in a particular direction.

(b) Properties: Reflection, refraction, diffraction and polarization.

(c) Used in

1. Radar systems used in aircraft navigation.
2. In communication via satellites.
3. Speed guns to determine speed of moving automobiles, cricket balls etc.
4. Ovens for cooking
5. In the study of atomic and molecular structure.