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Chapter 25: Q23CQ (page 928)

Under what circumstances will an image be located at the focal point of a lens or mirror?

Short Answer

Expert verified

The image will be located at a focal point in the situation whendi=f .

Step by step solution

01

Define Geometric Optics

Geometrical optics, often known as ray optics, is an optics model that describes light propagation using rays. In geometric optics, a ray is an abstraction that can approximate the routes along which light propagates under particular conditions.

02

Explanation

When an object is placed at infinity, then the light of rays is parallel to the axis of the mirror, or the lens meets or appears to meet at a focal point of the mirror and the lens, which then forms an image.

Therefore, the image will be located at the focal point only ifdi=f .

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Most popular questions from this chapter

If you wish to see your entire body in a flat mirror (from head to toe), how tall should the mirror be? Does its size depend upon your distance away from the mirror? Provide a sketch.

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Image Caption

Figure 25.50A full-length mirror is one in which you can see all of yourself. It need not be as big as you, and its size is independent of your distance from it.
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