- cross-posted to:
- hackernews@derp.foo
- science@lemmit.online
- cross-posted to:
- hackernews@derp.foo
- science@lemmit.online
Ultra-white ceramic cools buildings with record-high 99.6% reflectivity::undefined
Ultra-white ceramic cools buildings with record-high 99.6% reflectivity::undefined
Probably illegal here because of the high reflective value. Depending on the sun’s position, it could dazzle and blind people, e.g. people driving cars or riding bikes. I know that for this reason, shiny metal roofs are not allowed.
There is a difference between mirror like reflection and diffuse reflection. Mirror reflection is what you get with metal roofs which beam the sun directly to a target resulting in one spot being blinded. Diffuse reflection will spread it around, resulting in more light all around which is what we can handle as humans.
Can mostly handle. Snow blindness is a thing, and that’s all diffuse reflection too, not specular. But it’s unlikely a roof would be such a problem.
The reason for snow blindness is the fact the snow fills such a high portion of the visual field.
Yeah, hence it’s unlikely a roof would fill it to the same extent and wouldn’t be a problem.
We have snow here
It’s not visibly reflective. Yes, it’s white, but it’s cool to the touch because the majority of the energy is radiated out into space via non-visible wavelengths. Someone has already posted a great YouTube video from Night Hawk In Light in a comment where he explains how this tech works and makes his own paint!
Yeah, it’s good to read the article before commenting.
Here’s a link to the Night Hawk video. Good stuff. https://invidious.fdn.fr/watch?v=KDRnEm-B3AI This guy just gives away a formula he developed for the pigment. OG shit.
Him, Thought Emporium and Breaking Taps are in their own league of genius.
I have aluminium foil covering my windows in summer and that doesn’t blind anyone by far, even in full sunlight.
Not everything reflecting is a mirror.