Question

For each situation described below, answer the following questions and explain your reasoning:

• Should the magnification be larger or smaller than 1.00?

• Should the image be real or virtual?

• Should the mirror/lens be convex or concave?

1. A security mirror in a convenience store allows the clerk to view the entire store in one small image.

Answer and explanation:

2. A movie projector shines a movie onto a large screen in a theater.

Answer and explanation:

3. A person uses a magnifying glass to read the newspaper.

Answer and explanation:

Answer 1

Security Mirror

Image formed is smaller than object. Hence magnification is less than 1.

Image is virtual since it cannot be focused on a screen.

It is a convex mirror. Because they help to see a wide area than concave mirror.

Movie projector

Magnification is greater than 1

Image is real since it is focused on the screen.

Convex lens is used since concave lens produce virtual images only.

Magnifying glass

Magnification is greater than1.

Image is virtual since it cannot be screened.

Convex lens is used since concave lens produce small images.