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

• reflection

• refraction

• diffraction

• interference

What type of lens is the droplet acting like?

• bi-convex

• bi-concave

• plano-convex

• meniscus

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

• converging, convex

• converging, concave

• diverging, convex

• diverging, concave

Which of the following correctly labels points A, B, and C?

• focal point, focal length, principal axis

• focal point, principal axis, focal length

• principal axis, focal length, focal point

• focal length, focal point, principal axis

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 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

Classify the image formed in the droplet. Check two.

• real

• virtual

• inverted

• upright

Classify the image produced by the projector lens. Check two.

• real

• virtual

• larger than original

• smaller than original

Classify the image in the viewfinder lens of the camera.

• real

• virtual

• inverted

• upright