Chapter 25, Problem 31P

To determine

The magnification of the astronomical telescope.

Answer to Problem 31P

Solution:

$\text{1875}X$

Explanation of Solution

Given:

$\begin{array}{l}{f}_o=75cm\\ P=\frac{1}{f_e}=+25D\end{array}$

Formula used:

$M=-\frac{f_o}{f_e}$

Calculation:

Magnification of astronomical telescope is given by,

$\begin{array}{l}M=-\frac{f_o}{f_e}\\ M=-\frac{75}{\frac{1}{25}}\\ M=1875\text{X}\end{array}$