Which are characteristics of a ray when it hits a boundary and refracts, but not when it hits the boundary and reflects? Check all that apply.

A. changes direction

B. changes speed

C. does not change direction

D. does not change speed

E. bounces off the boundary

F. passes through the boundary

A ray becomes refracted when it passes through from less dense materials to a denser material. A common example of refraction is when you put a pencil in a glass of water, and you observed that it somehow "bends" as what you see outside the glass. When a ray becomes refracted it changes speed and passes through the boundary.