Suppose you wanted to start a fire using sunlight and a mirror. Which of the fol

Question

Suppose you wanted to start a fire using sunlight and a mirror. Which of the following statements is most accurate? A) It would be best to use a concave mirror, with the object to be ignited positioned halfway between the mirror and its center of curva B) It would be best to use a concave mirror, with the object to be ignited positioned at the center of curvature of the mirror. C) It would be best to use a convex mirror. D) It would be best to use a plane mirror. E) One cannot start a fire using a mirror, since mirrors form only virtual images.

Explanation / Answer

ANSWER :

It would be best to use a concave mirror, with the object to be ignited positioned halfway between the mirror and the center of curvature

Explanation:

For focussing the the sunrays at a point, it would be best if we use a concave mirror so that it converges the rays.

Now, for the sunrays which are essentially parallel to the principal axis of the mirror, will converge at the focal point of the mirror which is located exactly at the mid point of the mirror and center of curvature

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