On which principle is Total Radiation Pyrometer based?

Total Radiation Pyrometer is based on; option [C] Stephen’s law. According to Stephen’s law, the total radiant flux emitted by a black body is directly proportional to the fourth power of its absolute temperature. Total Radiation Pyrometers utilize this principle to measure temperature by detecting and quantifying the intensity of thermal radiation emitted by objects. By applying Stephen’s law, these pyrometers can accurately determine the temperature of objects without making physical contact. This is achieved by measuring the total radiation emitted by the object and then calculating its temperature using the relationship described by Stephen’s law. Total Radiation Pyrometers are commonly used in industries such as metallurgy, ceramics, and glass manufacturing, where high temperatures need to be measured accurately. They are also employed in scientific research, particularly in fields like astronomy and materials science, where non-contact temperature measurement is essential. Understanding Stephen’s law is crucial for the operation and interpretation of measurements obtained from Total Radiation Pyrometers in various applications.