Question

A solar cooker is made up of a concave mirror. Which of the following explains the working of such a solar cooking?

• A. Sun rays diverge and increase the area of projection.
• B. Sunrays are reflection are parallel to each other.
• C. Sun rays are absorbed by the mirror completely.
• D. Sun rays converge and focus on one single point.

Answer 1

The correct option is D Sun rays converge and focus on one single point.

Sun rays falling parallel to the principal axis of the concave mirror converges to the focus. This increases the intensity of the heat at the focus and makes it very hot.