Two lenses, one convex and other concave, are of same mass and same radius. Which will have greater moment of inertia?

Explanation

To determine which lens has a greater moment of inertia, we will analyze the distribution of mass in both the convex and concave lenses.

### Step-by-Step Solution:

1. **Understanding Moment of Inertia**:
The moment of inertia (I) of an object is a measure of how difficult it is to change its rotational motion about an axis. It is defined as:
\[
I = \sum m_i r_i^2
...