The heat-sensitive Chromazone table by Karim Rashid changes color when hot objects are placed on it.

Planck's solution to the spectrum of glowing, hot objects was to propose that atoms could lose energy only in finite jumps.

Hot objects like the sun emit infrared energy, which is absorbed by black matte surfaces and reflected by light, shiny surfaces.

Hot objects, such as ignited crucibles, should be allowed to cool in the air until, when held near the skin, but little heat is noticeable.

Hot objects emit very bright light (that is, give off a large number of photons), while cooler objects emit a lower number of photons.