Final answer:
The Rim Notch is used in the center bend of a Three Point Saddle to create a focused image of an arrow.
Step-by-step explanation:
The Rim Notch is a technique used in the center bend of a Three Point Saddle, while the arrows are used on the two outside bends.
In the context of physics, a Three Point Saddle refers to the bending of light rays when passing through lenses.
The Rim Notch helps locate the image of the tip of an arrow by causing the three rays of light to cross at a single point on the opposite side of the lens. This creates a focused image of the arrow.