1. A student must create a mode of a lens. The lens must be able to focus light into a small space. Which best describes the type of lens the student should model?
A. The student should model a convex lens because it gathers bands of color together to form white light.
B. The student should model a convex lens because it directs light toward the center of the lens.
C. The student should model a concave lens because it directs light toward the center of the lens.
D. The student should model a concave lens because it gathers bands of color together to form white light.

2. A telescope is a tool that helps people observe distant objects. In the simplest telescope design, incoming light hits a lens and is focused to a single point. This focused image is then magnified by a second lens so that it is roughly the same size as an observer's pupil. Which of the following wave behaviors plays the most important role in the functioning of this type of telescope?

A. interference
B. resonance
C. reflection
D. refraction