What does a ray diagram represent?

• A. The color of light.
• B. A representation of the path of light using straight lines and arrows.
• C. The speed of light.
• D. The energy source of the light.

Answer: (B)

Ray diagrams show how light travels by using straight-line paths with arrows to indicate direction. This simple model helps you visualize and predict what happens to light when it hits surfaces—how it reflects off a mirror or changes direction (refracts) when it passes into a different material. The diagram focuses on the path of light, not on its color, speed, or energy source, so color (wavelength), how fast light moves, or where the light comes from aren’t depicted. This makes it a practical tool for understanding basic optical behavior and image formation.