Obtain an expression for refraction at a single convex spherical surface separating the two media having refractive indices `mu_(1) `(rarer medium) and `mu_(2) `(denser medium) i.e., a relation between `u, v, mu_(1),mu_(2)` and R.

Explanation

To derive the expression for refraction at a single convex spherical surface separating two media with refractive indices \( \mu_1 \) (for the rarer medium) and \( \mu_2 \) (for the denser medium), we will follow these steps:

### Step 1: Diagram and Definitions
- Draw a convex spherical surface separating two media.
- Let the object be located in the rarer medium (with refractive index \( \mu_1 \)) and the image be formed in the denser medium (with refractive index \( \mu_2 \)).
- Define the following points:
- \( P \): The pole of the spherical surface.
- \( C \): The center of curvature.
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