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

changes direction

changes speed

does not change direction

does not change speed

bounces off the boundary

passes through the boundary

changes direction

changes speed

bounces off the boundary

B. changes speed

F. passes through the boundary

Explanation:

(This Answer is correct on Edge 2021)

A. "changes direction" is INCORRECT bc while the incident ray does change direction in refraction, it also changes direction in reflection, and we require only the characteristics that are present in refraction and not reflection.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.