An opaque object that is subject to radiant heat may show an increase in temperature.
Like a reporter near a Hawaiian lava flow.
That reporter then referred to the radiant heat as "up to some amount of °C". (What pleasantly caught my attention first was that he specified the unit used.)
He felt it's hotter the nearer he got, so it naively makes sense to assume an increase in temperature.
Note I refer to the sensory input of the person, not his experience of temperature, which may be pain for example. But part of that sensation was the effect of the IR radiation on his skin, or even the heat receptors of his skin.
I do not see how this "hot" can be expressed as a temperature.
One could wait until the temperature of the object comes to an equilibrium with available cooling, and then measure some well defined temperature, like the maximum of the surface temperature. But that is very different from the situation at hand, and depends a lot on properties of the object.
- Is it indeed possible to specify a meaningful amount of °C?
- If not, what would be best used instead?
- Or is the situation of the reporter just too ill-defined, even though he validly has the sensation of increased temperature?