Chapter 13, Problem 25R

To determine

To Choose: The correct option.

Answer to Problem 25R

The correct option is D.

Explanation of Solution

Introduction:

A reflecting telescope is an optical device which is used to see those distant objects that cannot be seen by naked eyes.

This telescope use mirrors to focus and collect the light. Reflecting telescope play a major role in the study of astronomy and terrestrial application.

The mirrors used in reflecting telescope are concave mirrors which converge the rays of light coming from distant object at focal point.

Since, convex lens behave as concave mirror therefore, it can also be used in reflecting telescope.

Concave lens which diverse the rays of light incident on it, cannot be used in reflecting telescope

Therefore, concave lens is not a part of reflecting telescope.

Conclusion:

Therefore, the correct option is D.