Question

what is the role of following in solar cooker (1) glass lid (2) plane mirror (3) containers and box are coated with black paint

Answer 1

1. The glass lid will allow the light and heat energy of the sun to come inside but the light energy will go out but the heat will be trapped inside the cooker to cook food.
2. The plane mirror will reflect the maximum light of the Sun inside the cooker.
3. The black colour of the vessel lets it to absorb more heat as dark colour absorb more heat.

Answer 2

1.glass lid- reflects and concentrates  the suns rays on the food
2.plane mirror-concentrates the rays on to the food
3.black paint absorb and withholds more heat