Explain the meaning of the terms focus and focal length in case of a convex mirror, with the help of , suitable ray diagram.

Explanation

To explain the terms "focus" and "focal length" in the context of a convex mirror, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Convex Mirror**:
- A convex mirror is a spherical mirror that bulges outward. It has a reflective surface on the outside.

2. **Principal Axis**:
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