Answer:
Light bouncing or reflecting off an object in different ways.
I just took a quiz and this was the answer
(k12 answer)
Answer:
Your father is still your real father since the mother and the brother never married, and that does not make your brothers cousins
Explanation:
When light changes the medium it travels through it also changes speed. The speed in medium is given by formula:

Rearranging formual gives:

From this formula we can make conclusion that index of refraction is inversely proportional to speed of light in medium. This means that greater speed gives smaller index of refraction.
Blue is pulling 100n harder