State two differences between a convex and a concave lens.

Explanation

To answer the question about the differences between a convex lens and a concave lens, we can follow these steps:

### Step 1: Definition of Convex Lens
A convex lens is a type of lens that is thicker in the middle and thinner at the edges. It converges (brings together) light rays that are passing through it.

### Step 2: Definition of Concave Lens
A concave lens, on the other hand, is thinner in the middle and thicker at the edges. It diverges (spreads apart) light rays that are passing through it.

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