Chapter 25, Problem 20P

To determine

The magnification of lens used with a relaxed eye.

Answer to Problem 20P

Solution:

$1.5625\text{X}$

Explanation of Solution

Given:

f=16cm

Formula used:

$M=1+\frac{N}{f}$

Calculation:

Magnification of the lens for relaxed normal eyes is given by,

$\begin{array}{l}M=\frac{N}{f}\\ \text{For}\text{relaxed}\text{normal}\text{eye,}N=25\text{cm}\\ M=\frac{N}{f}\\ M=\frac{25}{16}\\ M=1.5625\text{X}\end{array}$