What is the primary mode of heat transfer used in infrared thermography?

What is the primary mode of heat transfer used in infrared thermography?

What is the primary mode of heat transfer used in infrared thermography? A) Conduction B) Convection C) Radiation D) Evaporation Answer: C) Radiation Infrared thermography works by detecting infrared energy that is naturally emitted by all objects above absolute zero temperature. This energy travels in the form of electromagnetic waves, which is exactly what radiation is. Unlike conduction and convection, radiation does not require any physical contact or medium. It can travel through empty space, which is why a thermal camera can measure temperature from a distance without touching the object. Conduction is the transfer of heat through direct contact between materials. For example, when one end of a metal rod is heated, the heat travels to the other end through molecular interaction. While conduction affects how heat spreads inside an object, it is not what the thermal camera detects. The camera does not see internal heat transfer; it only sees the surface radiation emitted. Convection invol…