concepts

Thermophotovoltaics (TPV) converts heat directly into electricity: a hot emitter radiates a black-body spectrum onto bandgap-matched photovoltaic cells. It is the inverse of this K…

The one-letter difference that trips everyone up. Adsorption (with a D) is a SURFACE phenomenon — molecules adhere AT an interface without entering the bulk. Absorption (with a B) …

Geometric blackness is the principle of trapping light with shape rather than pigment: angled cavities catch incoming light in repeated reflections so a surface absorbs almost ever…

Kleptothermy is a thermoregulatory strategy in which an animal harvests the metabolic heat produced by another organism — the literal 'joule heist' that gives this KB its name. Mec…