During the camping, a group of boy scouts is about to make their own fire with the aid of sunlight. Two of the scouters are wearing eyeglasses: one is nearsighted and the other one is farsighted. Having knowledge about optics, they borrowed eyeglasses from the farsighted scouter and successfully produced a fire. What can you infer about the given situation?
I. The farsighted scouter must be wearing a converging lens that collects and focuses light rays at a common point to make a fire.
II. The farsighted scouter must be wearing a diverging lens which makes light rays converge at a focal point to make a fire.
III. The nearsighted scouter must be wearing a convex lens which makes light rays to diverge or scatter which is not appropriate to produce a fire.
IV. The nearsighted scouter must be wearing a concave lens in which refracted light rays scatter making the lens inappropriate for making a fire.
A. I and III
B. I and II
C. II and III
D. I and IV
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AnswerA.
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Explanation: