1. If you look at yourself through a concave mirror you may see your image up-side-down or up-right depending on how far you are from the mirror. Have you ever tried to use the concave side of a shining tablespoon as a mirror? You would see yourself up-right when...

A. you are very close to the tablespoon, inside the focal point.

B. you are far from the tablespoon, beyond the focal point

2. On some department stores we may see security mirrors. These mirrors are convex. Why?

A. Because they are cheaper than concave and flat mirrors.

B. Because they reproduce objects increased in size for better view.

C. Because they reproduce a larger field of view or the surroundings.

3. Telescopes used to study stars, planets, galaxies are using mirrors. Mirrors are lighter than lenses and can be built with many small pieces. Do you think that it would be more suitable a converging or a diverging mirror for these instruments to collect light?

A. A diverging (convex) mirror

B. A converging (concave) mirror

4. If the distance of the object is 250 cm and the distance of the image is 140 cm, I say that the focal length is 390 cm.

A. True

B. False

5.If the distance of the object is 35 cm and the distance of the image is 14 cm, what is the focal length of the mirror?

A. 10 cm

B. 29 cm

C. 23 cm

D. 0.1 cm

6. The distance of the object to the mirror is 12 cm. The focal length of the mirror is 10 cm. How far is the image from the mirror?

A. 22 cm

B. 12 cm

C. 60 cm

D. 5 cm

7. When a myopic person uses glasses to better see far away objects, they are seeing virtual projections of the objects. These images are enlarged.

A. True

B. False

8. The distance of the object is 30 cm, the image distance is 60 cm. What is the focal length of this converging lens?

A. 60 cm

B. 90 cm

C. 20 cm

9. What kind or mirrors are the last two?

The mirror on the upper left of the screen is convex and the mirror on the bottom right is concave.

Both mirrors are concave.

The mirror on the upper left of the screen is concave and the mirror on the bottom right is convex.

Both mirrors are just flat mirrors.