A beam of light travels at the highest speed in air. While light travels fastest in a vacuum, among the substances listed (water, air, glass, and plastic), air has the lowest refractive index, which means light travels through it faster than through the other materials.
Among the substances listed, in which one does a beam of light travel at the highest speed?
(1 point)
Responses
Water
Water
Air
Air
Glass
Glass
Plastic
Plastic
Skip to navigation
1 answer