Find the radius of curvature of the convex surface of a plan-convex lens, whose focal length is 0.3 m and the refractive index of the material of the lens is 1.5.

Explanation

To find the radius of curvature of the convex surface of a plan-convex lens, we can use the lens maker's formula. Here are the steps to solve the problem:

### Step 1: Identify the given values
- Focal length (f) = 0.3 m = 30 cm (conversion from meters to centimeters)
- Refractive index (μ) = 1.5
- For a plane surface, the radius of curvature (R1) = ∞ (infinity)

### Step 2: Write down the lens maker's formula
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