Post Assessment

1 . A ray of light passing through the focal point at an angle to the optic axis of a concave mirror is reflected back to ___________.

• Through the focal point.

• Parallel to the optic axis

• In the horizontal direction.

• Through the center of the sphere.

2. Why the back surfaces of automobile headlights are curved?

• To concentrate light in one direction.

• To get multiple images of the filament.

• For structural reasons not related to optics.

• Because inverted, real images of filaments shine brighter.

3. A human eye employs a _____ lens to form _____ images.

• Converging .... real

• Converging .... virtual

• . Diverging .... real

• . Diverging .... real

4. In most cameras the location of the image is adjusted to appear on the film by changing the ______.

• Position of the lens.

• Diameter of the diaphragm.

• Shape of the lens.

• Focal length of the lens.

A person views his image in front of a mirror. His image appeared to be real, inverted and larger than him. What kind of mirror did he used?

• . Plane Mirror

• Convex mirror

• Concave Mirror

• Magic Mirror