Respuesta :
Answer:
The answer is: B.) the speed decreases.
Explanation:
When the light passes from one medium to another, its speed changes.
The light is affected by the medium it passes through, so that the denser the medium is, the lower the speed of light. When crossing a diamond, for example, which is a very dense medium, the speed of light is reduced by a factor of 2,417.
The answer is: B.) the speed decreases.