Question

A concave mirror is used in a parabolic solar cooker

Answer 1

To focus the Infra red rays from the Sun in a pot the concave mirror is used.The spot at which the rays converge obtains high flux and hence the heat is concentrated at that point. the same point has the absorbing pot positioned.Hence the solar thermal effect is felt and is used for cooking.

Answer 2

Explanation:

A concave mirror is used in a solar cooker as it uses heat of the sunlight to cook food. The mirror focuses all the incident sunlight at a point. The temperature at that point increases, thereby cooking and heating the food placed at that point.