What kind of mirror is required for always obtaining a virtual image of the same size as the object ?

Options

A. Concave Mirror
B. Convex Mirror
C. Plane Mirror
D. None of these

Answer

To determine the kind of mirror required for always obtaining a virtual image of the same size as the object, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Image Formation**:
- A virtual image is formed when light rays appear to diverge from a point behind the mirror. This image cannot be projected onto a screen.

2. **Identifying Mirror Types**:
- There are three main types of mirrors:
- **Plane Mirrors**: Flat mirrors that reflect light to form images.
- **Concave Mirrors**: Curved mirrors that can form real or virtual images depending on the object's position.
- **Convex Mirrors**: Curved mirrors that always form virtual images, but these images are smaller than the object.

3. **Analyzing Plane Mirrors**:
- Plane mirrors always produce virtual images that are the same size as the object. This is because the distance of the object from the mirror (object distance) is equal to the distance of the image from the mirror (image distance).

4. **Conclusion**:
- Since a plane mirror forms a virtual image that is identical in size to the object, the answer to the question is that a **plane mirror** is required for always obtaining a virtual image of the same size as the object.

### Final Answer:
A **plane mirror** is required for always obtaining a virtual image of the same size as the object.

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