Extended Data Fig. 2: Radiative heat localization.
From: Enhanced solar evaporation using a photo-thermal umbrella for wastewater management
(a) Absorption coefficient of electromagnetic radiation in water with penetration depth of 30 m in visible wavelengths and 20 μm at mid-IR wavelengths. (b) Blackbody emissive power of the sun (T = 5505 °C) that emits in the visible and near-IR, and a blackbody at 100 °C that emits in mid-IR where water is strongly absorbing.
