🔍 Key Concepts

• RADAR mile definition in terms of time for a pulse to travel out and back • Relationship between speed of radio waves (speed of light) and distance • Unit conversions between nautical miles, meters, and microseconds

💭 Think About

• How long does it take a radar pulse, traveling at the speed of light, to go out to one nautical mile and back? • First find the time (in seconds) for the round trip, then convert that time into microseconds. • Which of the answer choices is closest to that calculated time, expressed in microseconds, not milliseconds or seconds?

✅ Before You Answer

• Be sure you are using the round-trip distance (out and back), not just one-way. • Confirm that you converted from seconds to microseconds correctly (1 second = 1,000,000 microseconds). • Check that you used the speed of light in consistent units (e.g., meters per second with distance in meters).