Mirror and Lens Quiz

When two plane mirrors are placed at a 90° angle, how many images of an object placed between them will be formed?

• 2

• 3

• 4

• 5

What is the total number of images formed when two plane mirrors are placed at an angle of 60°?

• 5

• 6

• 7

• 8

Two plane mirrors are placed at an angle of 170°. What is the number of images formed when an object is placed exactly between them?

• 2

• 3

• 4

• 1

A concave mirror forms a real image 30 cm in front of the mirror. If the object is placed 60 cm in front of the mirror, what is the focal length of the mirror?

• 10 cm

• 15 cm

• 20 cm

• 25 cm

An object 4 cm tall is placed 10 cm in front of a convex mirror. If the image appears to be 5 cm behind the mirror, what is the height of the image?

• 2 cm

• 1 cm

• 3 cm

• 4 cm

Which of the following is true for images formed by a convex mirror?

• Always real and inverted

• Always virtual and upright

• Sometimes real, sometimes virtual

• Always larger than the object

An object is placed in front of a concave mirror, and the magnification is found to be -2. What does this tell us about the image?

• It is upright and smaller

• It is inverted and smaller

• It is upright and larger

• It is inverted and larger

A concave mirror has a focal length of 15 cm. If an object is placed 30 cm in front of the mirror, what is the image distance?

• 10 cm

• 15 cm

• 30 cm

• 45 cm

An object 5 cm tall is placed 10 cm from a concave mirror, and the image is formed 20 cm in front of the mirror. What is the height of the image?

• 5 cm

• 10 cm

• 15 cm

• 20 cm

A mirror produces an image that is virtual, upright, and smaller than the object. The object is 6 cm tall and the image is 3 cm tall. What is the magnification?

• +0.5

• -0.5

• +2

• -2