(a) With the help of a labelled diagram, explain the construction and working of a solar cooker.
(b) Why is the solar cooker box painted black from inside?
(c) Why is the solar cooker box covered with a glass sheet?
(a) Construction and working of solar cooker:
A solar cooker consists of an insulated metal box or wooden box which is painted all black from inside. There is a thick glass sheet cover over the box and a plane mirror reflector is also attached to the box.
The food to be cooked is put in metal containers which are painted black from outside. These metal containers are then placed inside the solar cooker box covered with the glass sheet. The sun’s rays fall on the reflector, get reflected into the box through the upper glass and get trapped within it.