Question

Two students make a box type solar cooker they painted the insulated box with black colour from inside the cooking pots were painted black from outside and a plain mirror reflector is also attached on. the student covered the solar cooker box with a transparent glass sheet but the other student covered the solar cooker with a transparent plastic sheet which of the two solar cooker will be more efficient and why?

Answer 1

The student whose solar cooker wqs covered by glass will be more efficient because the glass trap energy in it.
means if energy (here solar energy ) entered once in the box it would not escape outside making the inside temp. of the cooker much warmer as compared to the solar cooker covered by the plastic sheet