2012 · Q19
The best colours for a Sun umbrella will be
General KnowledgePhysics
- Ablack on top and red on inside
- Bblack on top and white on inside
- Cred on top and black on inside
- Dwhite on top and black on inside
Explanation
A white top reflects solar radiation while a black underside absorbs scattered light, keeping the user cool and glare-free.