What is the angle of refraction?

When you dip a stick into a pool of water, what do you see? Doesn’t the stick appear to be bent at the point where it enters the water? This common but strange event illustrates that when a beam of light passes from one medium to another, such as from water to air, it does not continue on in a straight line; it is bent except when it hits the boundary perpendicularly. This is what scientists call refraction. The extent to which the light is refracted depends on the mediums—air, water, oil, glass, and so on—and on the angle of incidence, that is, the angle between the light ray and the vertical at the point of entry.

The human eye, a good example of this, has no problem with different colors of light. Its automatic focusing system is fast and efficient. It can see in three dimensions. It can detect millions of gradations of light and shades of color. It can create and record a new image every tenth of a second. The list goes on and on.

After reviewing evidence of design in nature, many people echo the sentiments of the Bible writer Paul, who said: “[God’s] invisible qualities are clearly seen from the world’s creation onward, because they are perceived by the things made, even his eternal power and Godship.”—Romans 1:19, 20.

Science is not man made, but was created by God for mankind. It's reflections are on Him, based on his laws of Physics.

Hope this was helpful and informative.