Light of different colors in a vacuum travel at
A)different speeds.
B)the same speed.
C)the same speed in both a vacuum and all materials.

Question

Quizplus · Accepted Answer

Light of different colors in a vacuum all travel at the same speed, which is the speed of light (299,792,458 m/s). However, the speed of light does change when it travels through different materials, such as air or water, because it interacts with the molecules in those materials.

Light of Different Colors in a Vacuum Travel at