(a) A point object, O is on the principle axis of a spherical surface having a radius of curvature, R. Draw a diagram to obtain the relation between the object and image distances, the refractive indicess of the media and the radius of curvature of the spherical surface.

Explanation

To solve the problem, we need to establish the relationship between the object distance (u), image distance (v), refractive indices (n1 and n2), and the radius of curvature (R) of a spherical surface. Here’s a step-by-step solution:

### Step 1: Draw the Ray Diagram
1. **Draw the Principal Axis**: Start by drawing a horizontal line representing the principal axis.
2. **Draw the Spherical Surface**: Draw a spherical surface (concave or convex) with the center of curvature (C) marked. The radius of curvature (R) is the distance from the center of curvature to the surface.
3. **Mark the Object**: Place a point object O on the principal axis, to the left of the spherical surface.
4. **Draw the Image**: Indicate where the image (I) is formed on the principal axis, to the right of the spherical surface.

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