chapter 17

An image behind the mirror is...

• virtual

• real

• inverted

• upright

An image that points below the principal axis is (choose 2)...

• virtual

• real

• upright

• inverted

This ray diagram is for which mirror?

• concave

• convex

• plane

• window

This type of mirror is used in supermarkets to see around bends

• concave

• convex

• plane

• window

The focal length of a spherical mirror is _____ the radius of curvature of the mirror.

• twice

• half

• the same

• unrelated to

Light from a laser strikes a plane mirror at an angle of 38 degrees to the normal. If the angle of incidence increases by 13 degrees what is the new angle of reflection?

• 38 degrees

• 51 degrees

• 65 degrees

• 84 degrees

You place an object 20 cm in front of a convex mirror with a –15 cm focal length. Calculate the image position

 $HINT.\ Use\ the\ mirror\ equation:\ \frac{1}{f}=\frac{1}{x_i}+\frac{1}{x_o}$  

• 9.45 cm

• 5.34 cm

• -4.35 cm

• -8.57 cm

If xi = -xo, then what is the meaning of the negative sign?

• The image is inverted

• The image is virtual

• The image is smaller

• The image is larger

Identify whether the following statement is true or false: “Virtual images are formed from divergent (scattered) rays.”

• True

• False

This is an example of a _________ mirror

• Concave

• Convex

• Magnifying

• Plane