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प्रश्न
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उत्तर
Take two sheets of tin plates, one blackened and the other is polished brightly. Fix some drawing pins on the outer side of both sheets using wax. Fix these plates vertically at a very short distance apart. Place a Bunsen burner midway between them. When you light the burner you will observe that the pins from the black painted sheet start dropping while the pins on the polished surface remain in the same position for a much longer time.
Thus, we can conclude that the black surface is a better absorber of heat than the polished one.
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संबंधित प्रश्न
Give a reason for the following:
An excess of carbon dioxide increases the temperature of the earth.
Why do we call carbon dioxide a greenhouse gas?
State three causes that have led to an increase in greenhouse gases in the atmosphere.
Give the options for reducing green house gases by use of fuels better than fossil fuels.
How will you minimize heat loss due to the following:
Conduction
Which of the following is not a green house gas?
In the following statement, the underlined words are jumbled up. Write them in their correct form.
Carbon dioxide, thaneme, nitrous oxide and water vapour are known as heengrouse sesga.
The increase in the levels of greenhouse gases results in a gradual increase in the temperature of the earth’s surface.
Assertion: Greenhouse gases maintain the temperature.
Reason: Greenhouse gases absorb infrared rays.
Answer:
The greenhouse effect leads to ______.
