Which of the following mirrors is used in a solar cooker?

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Plane mirror

Convex mirror

Concave mirror

None of the above

answer is C.

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Detailed Solution

A concave mirror is used in a solar cooker.
Concave mirrors are utilised in solar cookers because they reflect light to a single focal point. As a result, the concave mirror used in solar cookers collects all incident sunlight. It reflects it to a single focal point, where the radiation is particularly intense due to the concentration of heat energy. When we set a cooking pot on the focal point of the light, the energy is strong enough to cook food.
Convex and flat mirrors, on the other hand, cannot be utilised in solar cookers because they do not converge all of the light to a focal point, making it impossible to concentrate the energy.

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