There is a plano-convex lens whose radius of curvature for convex surface is 2.5 cm. Thickness of the lens is 9 cm. When object is placed at a certain distance from the convex surface then image is formed on the plane surface of the lens which serves as screen. What should be the magnification in this case? Refractive index is 1.5.

Explanation

To solve the problem, we need to determine the magnification produced by a plano-convex lens when an object is placed in front of it. We will use the lens maker's formula and the magnification formula for lenses.

### Step-by-Step Solution:

1. **Identify the Given Values:**
- Radius of curvature of the convex surface, \( R = 2.5 \, \text{cm} \)
- Thickness of the lens, \( d = 9 \, \text{cm} \)
- Refractive index of the lens, \( \mu = 1.5 \)
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