Does a white shirt weight more

[ahuberpsu]

Does a white shirt weight more than a dark shirt of the same material when exposed to sunlight?

I think that photos exert a pressure on the material, and since white shirts reflect some light it would experience twice the change in momentum compared to a completely dark shirt. Then the shirt would weight more?

 

[phinds]

well, on the other hand, dark shirts absorb more, so have more energy, thus more effective mass, so should weight more.

I have no idea, really

 

[Naty1]

A dark shirt will have additional [heat] energy and so will 'weigh' more. Such a change is analogous to a coiled spring having more energy and hence a greater gavitational attraction than an uncoiled spring.