Thursday, 6 September 2012

Experimental Proof for Dark Colour absorbs more Heat

Things You Need
  •  2 identical drinking glasses or jars
  • Water
  • Thermometer
  • 2 elastic bands or some cello-tape
  • White paper
  • Black paper 
The Way You Do
  1. Wrap the white paper around one of the glasses using an elastic band or cello-tape to hold it on.
  2. Do the same with the black paper and the other glass.
  3. Fill the glasses with the exact same amount of water.
  4. Leave the glasses out in the sun for a couple of hours before returning to measure the temperature of the water in each. 
What You Observe

Dark surfaces such as the black paper absorb more light and heat than the lighter ones such as the white paper. After measuring the temperatures of the water, the glass with the black paper around it should be hotter than the other. Lighter surfaces reflect more light, that's why people where lighter colored clothes in the summer, it keeps them cooler. 


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