two professors are stranded on a deserted island. Both wear glasses, though one

Question

two professors are stranded on a deserted island. Both wear glasses, though one is nearsighted and the other is farsighted. Which person's glasses should be used to focus the rays of the Sun and start a fire? nearsighted or farshighted?

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.
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.

Explanation / Answer

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.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.