At one afternoon, which will be cooler, a white object or a black one?

if both are left under a shade from 4:30 pm to 5:30pm...At one afternoon, which will be cooler, a white object or a black one?
generally and roughly speaking, the lighter-colored the object is, the more it reflects light instead of absorbing it.





so, if all other things are equal (details of surface, heat capacity, thermal mass etc), the white object should be cooler than the black one...





edit: the 'in the shade' part is pretty much irrelevant. if both objects are seeing the same intensity and spectrum of light, the lighter one will reflect more of that light compared to the darker one...


both objects will temperature-equilibrate with the outside air (in the light or dark) via conduction/convection/radiation.


if the only difference between these two objects is the color, this thermal equilibration will occur at the same rate. the only difference then is how effectively the two object absorb IR/visible/UV light, and what is the result of that absorbed light....





of course this difference will be very very small ';in the shade';. i think the result will be that the warmer black object will simply just lose this extra heat via the other three processes to compensate for the heat absorbed radiatively...





in direct sunlight, the other three processes would not be able to keep up, and the black object would be noticably warmer...





cheersAt one afternoon, which will be cooler, a white object or a black one?
White because light objects absorb less heat than dark objects.


My dad for example has a white car which is cooler once you get in.


My mom has darker green car and it is hotter inside.


The less energy is absorbed the less you have to emit


It will take longer to get rid of more energy than less energy
it is right that black is the better emiter but only if the temperature of the black surface is more than that of its surroundings. White would be the cooler of the two. I have already answered a question like this one, and here is it's link: http://answers.yahoo.com/question/index;鈥?/a>
Under a shade, they will be the same temperature. In the sun, the white one would be cooler. Haley's mom maybe good at math, but this isn't math. She probably didn't even notice the ';under a shade'; part.
It is a proven fact that dark colors trap and hold more heat. So the white will be slightly cooler.
my mom is good at math and she said WHITE