Answer:
A. the indices of refraction matched
Explanation:
The index of refraction, or refractive
index, is a measure of how fast light
rays travel through a given medium.
Alternatively, it could be said that
the refractive index is the measure of
the bending of a light ray when
passing from one medium to
another. Mathematically, it can be
represented as a ratio between two
different velocities – the velocity of
light in vacuum and the velocity of
light in a given medium.
For example, try putting a pencil in a jar full of water. If you look at the pencil from above, it would look as though the pencil has bent in the water. That happens due to the refraction of light. It occurs because as light rays enter water, they slow down, as the speed of light in water is lower than the speed of light in air. The magnitude of how much a medium refracts a light ray is determined by the index
