Why does water in a black test tube cool down faster then water in a white test tube?

this cast doubt is from a lab i did and got these results
itz related to albedo and stuff
so can sm1 pls tell me
thx


Depends. Is this fa on a sunny day, is it in a dark room/at night?

If it is in a dark apartment or at night, it means that radiation to the surroundings assists the stress transfer required for cooling. The result is that the black test tube cools faster.

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