Concept explainers
The magnification of the Galilean telescope.
Answer to Problem 33P
Solution:
The magnification of the given Galilean telescope is found to be .
Explanation of Solution
Explanation;:
A Galilean telescope has convex lens which functions as its objective and a concave lens as its eye piece. The telescope produces an erect image of the object.
Angular magnification M of the telescope is the ratio of the focal lengths of the objective and the eye piece.
Here, the focal length of the objective lens is and the focal length of the eye piece is .
The length l of the telescope is the sum of the focal lengths of the objective and the eye piece.
Given:
The length of the telescope
The focal length of the objective
Formula:
Calculation:
Using the given values of the length and the focal length of the objective, calculate the focal length of the eye piece.
Use the calculated value of the focal length of the eye piece and the value of the focal length of the objective lens in the expression for magnification.
Chapter 25 Solutions
Physics: Principles with Applications
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