why solar cooker boxes covered with a plane glass plate why?
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As the heat from the sun goes in side the solar cookers, this heat needs to be trapped inside the cooker so that the temperature may remain enough to heat the food, so to trap this heat so that it does not escape back out from the cooker, a glass is kept which keeps the heat inside the cooker.
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Answer. This glass sheet covers does not allow the solar energy to flow out in the form of radiant heat. Thus it traps more and more heat rays of the sun thereby producing green house effect. That is why glass lid is used in the solar cooker.
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