![]() Most communication satellites use C-, X-, and Ku-bands to send signals to a ground station. L-band microwaves, like those used by a Global Positioning System (GPS) receiver in your car, can also penetrate the canopy cover of forests to measure the soil moisture of rain forests. Medium-length (C-band) microwaves penetrate through clouds, dust, smoke, snow, and rain to reveal the Earth's surface. Different wavelengths of microwaves (grouped into "sub-bands") provide different information to scientists. Microwaves are a portion or "band" found at the higher frequency end of the radio spectrum, but they are commonly distinguished from radio waves because of the technologies used to access them. The interaction of these molecules undergoing forced rotation creates heat, and the food is cooked. Microwave ovens work by using microwave about 12 centimeters in length to force water and fat molecules in food to rotate. You may be familiar with microwave images as they are used on TV weather news and you can even use microwaves to cook your food. Shown here is Hurricane Claudette's eye-wall making landfall. ![]()
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