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प्रश्न
A solar cooker may not cook food if
(a) the solar cooker is not placed in the shade
(b) the glass sheet cover of solar cooker is not closed
(c) a convex mirror reflector is not used
उत्तर
the glass-sheet cover of the solar cooker is not closed
The glass sheet prevents the sunlight incident on it from being reflected back.
shaalaa.com
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