Which term describes the measurement method where the travel time of light is utilized?

• A. Range finding
• B. Time of flight
• C. Laser calibration
• D. Signal processing

Answer: (B)

The term that accurately describes the measurement method where the travel time of light is utilized is "Time of flight." This method is based on the principle of measuring the time it takes for a light signal, such as a laser pulse, to travel from a source to a target and back to the source. By calculating the time elapsed and considering the speed of light, one can determine the distance to the target.

This technique is widely used in various applications, such as speed measurement devices, where determining the exact distance and speed of vehicles is crucial. The ability to measure distances with high accuracy and speed makes time of flight a fundamental principle in technologies like radar and laser distance measurements.