Explain the main purpose of using plane mirrors in solar cookers

Mirrors are used as they increase the amount of sunlight falling on the glass surface of the cooker. The total sunlight used for cooking would become = Sunlight falling directly on the glass + Sunlight reflected from the mirror.

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  • 19

The sun rays pass through the glass sheet cover or plane mirrors and get absorbed inside the cooker box. It traps more and more heat rays of the sun, thus heating the food item.

  • 15

it is better to use concave mirrors since their focussing capability is quite good

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