Context: The concept of emissivity is important in understanding the infrared emissions of objects. This is a property of a surface that describes how its thermal emissions deviate from the ideal of a black body. To further explain, two objects at the same physical temperature will not show the same infrared image if they have differing emissivity. For example, for any pre-set emissivity value, objects with higher emissivity will appear hotter, and those with a lower emissivity will appear cooler. For that reason, incorrect selection of emissivity will give inaccurate results when using infrared cameras and pyrometers.

Question: What is the term for the property that describes how a surface's thermal emissions deviate from the ideal of a black body?
Answer: emissivity

Question: How will the infrared image of an object with a higher emissivity appear in relation to one with lower emissivity?
Answer: hotter

Question: Along with pyrometers, what devices can receive inaccurate results if emissivity is not set correctly?
Answer: infrared cameras

Question: What property describes how a surfaces thermal emissions give inaccurate results when using infrared cameras and pyrometers?
Answer: Unanswerable

Question: What shows the same image of two objects with differing emissivity?
Answer: Unanswerable

Question: What ideal shows inaccurate results when using infrared cameras?
Answer: Unanswerable

Question: How does pre-set emissivity help infrared cameras give accurate results?
Answer: Unanswerable

Question: How does comparing two differing objects to a black body give you accurate results?
Answer: Unanswerable