A Convex Spherical Surface with Radius R Separates a Medium

question 37

Multiple Choice

A convex spherical surface with radius r separates a medium with index of refraction 2 from air. As an object is moved toward the surface from far away along the central axis, its image:

• A) changes from virtual to real when it is r/2 from the surface
• B) changes from virtual to real when it is r from the surface
• C) changes from real to virtual when it is r/2 from the surface
• D) changes from real to virtual when it is r from the surface
• E) remains real

---

Definitions:

Retinae

The plural form of retina, which are the light-sensitive layers of tissue at the back of the eyes that convert light into neural signals for vision.

Fibrous Outer Surface

Refers to an external layer composed of or characterized by fibers, often describing anatomical tissues or plant structures.

Sclera

the white outer layer of the eyeball, serving as a protective coating.

Pupil Dilate

The process where the pupil, the opening in the center of the iris of the eye, becomes larger to allow more light to enter.