MIRROR/LENS QUESTIONS FOR REVIEW

What is true about a virtual image?

• light rays converge and pass through

• light rays diverge but do not pass through

• light rays diverge as they pass through

• light rays converge but do not pass through

How can you describe your image when you stand in front of a plane mirror?

• real, erect, and smaller than you

• real, erect, and the same size as you       

• virtual, erect, and smaller than you

• virtual, erect, and the same size as you

A ball is held 50 cm in front of a plane mirror. What is the distance between the ball and its image? Give the exact value answer in cm.

The angle between a horizontal ruler and a vertical plane mirror is 30◦. What is the angle between the ruler and its image? Give the exact value without units.

Which describes the image produced by an erect object in front of a convex mirror?

• real, erect, and larger than the object

• virtual, erect, and larger than the object

• real, erect, and smaller than the object

• virtual, erect, and smaller than the object

An erect object is located between a concave mirror and its focal point. Which describes its image?

• real, erect, and larger than the object

• real, inverted, and larger than the object

• virtual, erect, and larger than the object

• virtual, inverted, and larger than the object

What happens to its image as an object is moved from the center of curvature of a concave mirror toward its focal point?

• remains real and becomes larger

• remains virtual and becomes larger

• remains real and becomes smaller

• remains virtual and becomes smaller

A point source is to be used with a concave mirror to produce a beam of parallel light. Where should the source be placed?

• at the center of curvature           

• as close to the mirror as possible

• midway between the center of curvature and the mirror

• midway between the center of curvature and the focal point

An erect object is located on the central axis of a spherical mirror. The magnification is −3. What does this mean?

•   its image is real, erect, and on the same side of the mirror

• its image is real, inverted, and on the same side of the mirror

• its image is virtual, erect, and on the opposite side of the mirror

•   its image is real, inverted, and on the opposite side of the mirror

  What is the reflection of an object if seen in a concave mirror?

• always be real.

• will always be enlarged

• always be virtual

• may be either real or virtual