Please read the reference posted in the comment section and answer Part I-IV. These are just easy activities, trust me. I just don't have time. I want an excellent looking answer. Thank you. I'll rate you helpful if I got satisfied.

Part I:

1. What happens when a ray parallel to the principal axis passes through a convex lens Explain the illustration below in brief and concise. Parabolic mirror Large spherical mirror Small spherical mirror F F (a) (b) (c)1. How does the focal length of a mirror below relate to the mirror's radius of curvature? Incident ray O R Normal P C F Reflected ray