Question 6(multiple choice worth 2 points) select the statement that correctly describes how light travels? light can travel in a vacuum, and its speed is constant even if the light source is moving. light can travel in a vacuum and will travel slower if the light source is moving in the same direction. light can travel in a vacuum, and it travels faster if the light source is stationary. light travels only through a medium, it travels faster if the light source is stationary.