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· CEPredict/Explain Two professors arc stranded on a
Chapter 27, Problem 16P(choose chapter or problem)
Problem 16P
· CEPredict/Explain Two professors arc stranded on a deserted island. Both wear glasses, though one is nearsighted and the other is farsighted. (a) Which person’s glasses should be used to focus the rays of the Sun and start a fire? (b) Choose the best explanation from among the following:
I. A nearsighted person can focus close, so that person’s glasses should be used to focus the sunlight on a piece of moss at a distance of a couple inches.
II. A farsighted person can’t focus close, so the glasses to correct that person’s vision are converging. A converging lens is what you need to concentrate the rays of the Sun.
Questions & Answers
QUESTION:
Problem 16P
· CEPredict/Explain Two professors arc stranded on a deserted island. Both wear glasses, though one is nearsighted and the other is farsighted. (a) Which person’s glasses should be used to focus the rays of the Sun and start a fire? (b) Choose the best explanation from among the following:
I. A nearsighted person can focus close, so that person’s glasses should be used to focus the sunlight on a piece of moss at a distance of a couple inches.
II. A farsighted person can’t focus close, so the glasses to correct that person’s vision are converging. A converging lens is what you need to concentrate the rays of the Sun.
ANSWER:
Step 1 of 2
(a)
Here we need to explain which person’s glasses should be used in order to focus the rays of the sun and start a fire. If two professors wear glasses, though one is nearsighted and other is farsighted.
The professor with farsightedness has the glasses made of converging lenses. Therefore, the farsighted person’s glass has to be used for starting fire by focusing sun rays.