As a tractor pulls a plow across a field, it exerts a force on the plow in the forward direction. What is the "equal and opposite force" in this interaction, according to Newton's third law?

the force of the plow pulling backward on the tractor

Explanation:

concave lenses are used here. they spread the light out before it reaches the convex lens in the eye, therefore letting the image focus directly on the retina. hyperopia is known to you probably as farsightedness.

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray