How does the concept of parallel rays relate to the formation of images in concave mirrors?

The concept of parallel rays is important in understanding how images are formed in concave mirrors. When parallel rays of light hit a concave mirror, they are reflected and converge at a specific point called the focal point. This convergence of rays creates an inverted and real image in front of the mirror. The distance between the mirror and the focal point determines the size and position of the image.