Final answer:
An infrared thermometer is best used to measure the temperature of surfaces.
Step-by-step explanation:
An infrared thermometer is best used to measure the temperature of surfaces. Infrared thermometers work by detecting and measuring the amount of infrared radiation emitted by an object. They are commonly used in various applications such as checking the temperature of an aircraft carrier's ventilation system or measuring body temperature by gently placing them in the ear canal.