Choose the incorrect statement regarding the image formed by a plane mirror.

Options

A. The image formed by a plane mirror is erect or upright.
B. The image formed by a plane mirror is laterally inverted.
C. The image formed by a plane mirror is virtual in nature.
D. The image formed by a plane mirror is smaller than the object.

Answer

To solve the question regarding the incorrect statement about the image formed by a plane mirror, we will analyze each statement based on the properties of images formed by plane mirrors.

### Step-by-Step Solution:

1. **Understanding the Nature of the Image**:
- A plane mirror produces a virtual image. This means that the image cannot be projected onto a screen because the light rays do not actually converge at the image location.

2. **Size of the Image**:
- The size of the image formed by a plane mirror is equal to the size of the object. This means if the object is 5 cm tall, the image will also be 5 cm tall.

3. **Orientation of the Image**:
- The image formed by a plane mirror is erect (upright). This means that the image maintains the same orientation as the object.

4. **Lateral Inversion**:
- The image formed by a plane mirror undergoes lateral inversion. This means that the left side of the object appears on the right side of the image and vice versa.

5. **Analyzing the Options**:
- Now, let’s analyze the statements:
- **Statement 1**: The image is virtual. (True)
- **Statement 2**: The size of the image is equal to the size of the object. (True)
- **Statement 3**: The image is erect. (True)
- **Statement 4**: The image is smaller than the object. (False)

6. **Conclusion**:
- The incorrect statement is **Statement 4**: "The image formed by the plane mirror is smaller than the object." This is false because the image is the same size as the object.

### Final Answer:
The incorrect statement regarding the image formed by a plane mirror is: **"The image formed by the plane mirror is smaller than the object."**

---