Talk:Selective surface

Selective surface food
Somebody should test various edibles for selective surface properties. The microwave meal people could develop one-use solar box cookers with the food inside, all ready to go - just set it in the sun for the prescribed time, and hot-food is hot and the warm-food is warm. - Yossarian4010

Assessment comment
Substituted at 05:44, 30 April 2016 (UTC)

reflectivity aspect
the ways of rays through materials depend on the reflectivity of the matters interface, again depending on the refractive indexes of the involved phases. polished metal normally reflects infrared rays, thats why thermobottle has mirror to keep the warmth. to avoid reflection a inhomogenity in the phase transition must be intruduced by varying the refractive index. this was done already in anti-reflection coating or by gradient index optics. --Konfressor (talk) 09:34, 12 November 2020 (UTC)