The radius of curvature of a plane mirror

Options

A. a is zero
B. b is infinity
C. c can be anywhere between zero and infinity
D. d None of the above

Explanation

To determine the radius of curvature of a plane mirror, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Concept of Radius of Curvature**:
- The radius of curvature (R) is defined as the radius of the sphere of which the mirror is a part. For curved mirrors (concave or convex), this radius is finite.

2. **Identifying the Nature of a Plane Mirror**:
- A plane mirror is flat and does not have any curvature. It can be thought of as a section of a sphere with an infinitely large radius.

3. **Mathematical Representation**:
- For a curved mirror, the radius of curvature is a finite value. However, for a plane mirror, since it is flat, we consider the radius of curvature to be infinite.

4. **Conclusion**:
- Therefore, the radius of curvature of a plane mirror is defined as infinite.

### Final Answer:
The radius of curvature of a plane mirror is **infinity**.

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