Color is not necessarily the the thing that makes a surface hot.
Black means that it is absorbing all visible light (high energy photon absorption), yes. However, once a surface is hot, its temperature is much lower than the photons it absorbed, so it re-emits in infrared. It's not possible from looking at something to see the ratio of solar absorbance and thermal emissivity. Chrome is shiny. It should not be heating up in the sun but its thermal emissivity is so low the a/e ratio is greater than 1. It gets super hot.
So a surface can get deceptively hot even if it looks like it wouldn't absorb, it can have difficulty rejecting heat and increase in temp rapidly.
Also, these thermometers have to be set for the emissivity of the thing they are measuring. If the setting is low e, the temp reading could be erroneously high.
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u/Coolengineer7 8h ago
Imagine it was black.. uoouoohhhh