Question

in which of these does light travel the slowest?
Air
Water
Vacuum

Answer 1

wasser

Answer 2

You can find this out by looking up the index of refraction for the specified materials:
n-air =1.000293
n-water = 1.33
n-vacuum = 1

The higher the index, the slower light moves through the medium

Answer 3

So light velocity in vaccum is the fastest

Answer 4

Light velocity in air is slower than that of vaccum

Answer 5

Now wt do u think the velocity of light in water. Is it fastest or slowest or medium???!!!