I mean, how about gravity for example! When you draw a free-body diagram, you will almost always have to include gravity. How about normal force, or static friction? There are defintely forces at hand.
<span>The angle between refracted ray and normal is called the Angle of Refraction. The angle formed by a refracted ray or wave and a line perpendicular to the refracting surface at the point of refraction</span>
