Does a white shirt weight more

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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?
 
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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 :smile:
 
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.
 

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