Explaining a Process-2

There's an  interesting experiment to show that black is a better collector of solar energy than white.  After starting the experiment, you have to prepare 2 tin cans, black and white paint and a room thermomrter.  First, paint the cans-one black and one white.  Second, fill the cans with water.  Third, put the cans in direct sunlight for three hours.  Last but not least, check the temperature of the water in the cans and compare.  After few minutes later, you can find that the temperature of the water in the black can is high.  By this experiment,  you can know the black is a better collector of  solar energy than white.