Final answer:
Radar is a common application of microwaves that increases airspace utilization by allowing ATC to reduce the separation interval between aircraft. It also expands flight information services. Radar systems can determine the distance to objects and provide various essential information for air traffic control.
Step-by-step explanation:
Radar is a common application of microwaves that allows ATC to reduce the separation interval between aircraft, thereby increasing airspace utilization. By detecting microwave echoes, radar systems can determine the distance to objects such as clouds and aircraft. This technology also enables the expansion of flight information services like traffic information, radar navigation assistance, and information on chaff drops and bird activity.