Multiple choice

Why is a concave mirror used in solar cookers?

  1. It reflects and distributes the sunlight at all points.

  2. It reflects and focusses the sunlight at a point.

  3. It can magnify the solar energy.

  4. It reflects and focusses sunlight at the optical centre.

  5. -
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct answer. Concave mirror reflects and focusses the sunlight at a point, due to which temperature at the point increases, which heats and cooks up the food.

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