Magnification produced by a plane mirror is:

Options

A. `-1`
B. 0
C. `+1`
D. `oo`

Explanation

To determine the magnification produced by a plane mirror, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Magnification**: Magnification (M) is defined as the ratio of the height of the image (h') to the height of the object (h). Mathematically, it is expressed as:
\[ M = \frac{h'}{h} \]

2. **Characteristics of Image in a Plane Mirror**: In a plane mirror, the image formed has the following characteristics:
- The image is virtual, meaning it cannot be projected on a screen.
- The image is erect, meaning it has the same orientation as the object.
- The size of the image is equal to the size of the object.

3. **Applying the Characteristics**: Since the image is of the same size as the object, we can say:
\[ h' = h \]
Therefore, substituting this into the magnification formula gives:
\[ M = \frac{h}{h} = 1 \]

4. **Sign of Magnification**: The magnification produced by a plane mirror is positive because the image is erect. Thus, we can conclude:
\[ M = +1 \]

5. **Final Conclusion**: Therefore, the magnification produced by a plane mirror is:
\[ \text{Magnification} = +1 \]

### Final Answer:
The magnification produced by a plane mirror is **+1**.

---