Question

Class 10 CBSE

Two students made box type solar cookers separately . They both painted the insulated Box with black colour from inside , the cooking pots were painted black from outside and a plane mirror reflector was also attached . One of the students covered the solar cooker Box with a transparent glass sheet but the other student covered the solar cooker Box with a transparent plastic sheet. Which of the two solar cookers will be more efficient and why? ​

Answer 1

Explanation:

Glass sheet is used so as to present the escape of heat from the box (green house effect) . If plastic sheet is used, heat would be lost from the box. Glass traps the heat.

Block surfaces absorb heat radiation.

Answer 2

Explanation:

Glass sheet is used so as the present the escape of heat from the box.If plastic sheet is used heat would be lost from the box.