3. An object that is 3.00 cm high is placed 18.0 cm in front of a concave mirror with a radius of curvature of 52.0 cm. Find the magnification
and location of the corresponding image in relation to the mirror's
surface. Draw a ray diagram to confirm the position and magnification
of the image.

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?