Solution Found!
IP You are comfortably reading a book at a distance of 24
Chapter 27, Problem 39P(choose chapter or problem)
Problem 39P
IP You are comfortably reading a book at a distance of 24 cm. (a) What is the refractive power of your eyes? (b) Does the refractive power of your eyes increase or decrease when you move the book farther away? Explain. (For the purposes of this problem, treat the eye as a single-lens system, with the retina 2.40 cm from the lens.)
Questions & Answers
QUESTION:
Problem 39P
IP You are comfortably reading a book at a distance of 24 cm. (a) What is the refractive power of your eyes? (b) Does the refractive power of your eyes increase or decrease when you move the book farther away? Explain. (For the purposes of this problem, treat the eye as a single-lens system, with the retina 2.40 cm from the lens.)
ANSWER:
Step 1 of 3
(a) Calculate the refractive power of the eyes.
The refractive power is the inverse of the focal length. Hence, we can find the focal length by solving the thin-lens equation for . These yields,