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7th Class Science Heat Question Bank Heat

  • question_answer
    Riaz needs a box which can absorb the heat from the sun very fast but lose it very slowly. How should the outer and the inner surface of the box be colored so that he gets the best result?

    A)  Outer-Silver/Inner-Silver

    B)         Outer-Black/Inner-Black

    C)         Outer - Silver, Inner ? Black

    D)         Outer - Black, Inner ? Silver

    Correct Answer: D

    Solution :

    The outer surface should be black as more heat from the sun should be absorbed. The inner surface should be coated with silver so that most of the heat is retained/ radiated into the box.


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