Question

The speed of light in four different materials is shown below:

Which material is the least dense?
Material A
Material B
Material C
Material D

Answer 1

C

Step-by-step explanation:

The following passage asks you, "Speed of light in thousand miles per hour", You would need to know the original Value and then divide it into the seconds. And when you do that, You may understand that the answer is C.

Answer 2

Material C. the less dense is easier to move through than the more dense, so the light moves faster. Its like light moving through less dense glass, then moving through a more dense wall.