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 plane mirror. 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 concave mirror, with the object to be ignited positioned halfway between the mirror and its center of curvature. D) It would be best to use a convex mirror. E) One cannot start a fire using a mirror, since mirrors form only virtual images.

Explanation / Answer

Answer is C

It is better to use a concave mirror

Because,

when light ray which comes from infinity after reflecting it converges in focus and then large amount of heat occurs and it burns the object and the object should be kept at focus.

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