1-a matt black surface
2-a polished silver surface
2007-08-10 05:16:14 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Physics
2 is a better radiator of heat.
1 absorbs the heat.
Go to page 4 on this link:
http://www.cambridge.org/uk/education/secondary/science/ks4/science_foundations/downloads/physics_sample.pdf
2007-08-10 05:21:25 · answer #1 · answered by Anonymous · 0⤊ 1⤋
A matt black surface absorbs more heat that a shiny silver surface. Have you ever noticed on a hot day, that you're even hotter wehen you're wearing black?
This means, because the silver isn't absorbing the heat, it is radiated back.
2007-08-10 05:24:28 · answer #2 · answered by Daniel/Laura Black. 2 · 0⤊ 0⤋
1. a matt black surface absorbs more heat than a shiny one,it also radiates heat at a faster rate.
2007-08-14 04:23:39 · answer #3 · answered by Prince Of Persia 1 · 0⤊ 0⤋
Heat is a radiation of micromasses.
Radiation becomes absorbed by atoms increasing their mass.
A black color sustance means that it contains more receptive atoms to absorb heat.
A mirror show that a smooth surface has less atoms to absorb heat as compared to an irregular suface .
A black body is the best radiator.
2007-08-10 05:43:46 · answer #4 · answered by goring 6 · 0⤊ 0⤋
The black surface is the better radiator as it is the better emitter of heat (IR) energy. The emissivity of a black surface is typically ~0.85. For metals is ~0.1 or even less.
2007-08-11 11:38:06 · answer #5 · answered by J T 1 · 0⤊ 0⤋
PROVIDED BOTH ARE MADE OF THE SAME MATERIAL,
then the answer is #2.
Otherwise you must also consider which material is a better heat conductor.
.
2007-08-10 05:47:04 · answer #6 · answered by Anonymous · 0⤊ 0⤋