Remedial Quiz - Image Formation in Lenses

In this photograph, the water droplet is acting like a lens. Lenses work because of _________.

• reflection

• refraction

• diffraction

• interference

The lens pictured is exhibiting _______ behavior and is ______ in shape.

• converging, convex

• converging, concave

• diverging, convex

• diverging, concave

The focal length of this lens is _______.

• negative because it can form real images

• positive because it can form real images

• negative because it can form virtual images

• could be positive or negative depending on the image formed

The lens pictured is exhibiting _______ behavior and is ______ in shape.

• converging, convex

• converging, concave

• diverging, convex

• diverging, concave

The diagram shows light rays passing through a convex lens. Which point, A, B, C, or D, is the focal point?

• A

• B

• C

• D

An object is placed 15.0 cm in front of a convex lens with a focal length of 10.0 cm. What is the image distance?

• 6 cm

• 25 cm

• 30 cm

• 150 cm

An object is placed 15.0 cm in front of a convex lens with a focal length of 10.0 cm. What is the image distance?

• 6 cm

• 25 cm

• 30 cm

• 150 cm

The diagram shows an object placed in front of a convex lens. What are the characteristics of the image formed?

• Real, inverted, same size

• Real, inverted, magnified

• Virtual, upright, magnified

• Real, inverted, diminished

Describe the image produced by the projector lens.

• real, inverted, smaller

• virtual, upright, smaller

• real, inverted, bigger

• virtual, upright, bigger

Describe the image produced by the lens of the human eye.

• real, inverted, smaller

• virtual, upright, smaller

• real, inverted, bigger

• virtual, upright, bigger