A positive magnification greater than unity indicates:

Options

A. real image
B. virtual image
C. neither real not virtual image
D. distorted image

Explanation

To determine what a positive magnification greater than unity indicates, we can analyze the concept of magnification in optics.

### 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). It can also be expressed in terms of the distances of the image (v) and object (u) from the lens or mirror:
\[ m = \frac{h'}{h} = \frac{v}{u} \]
Here, \(h'\) is the height of the image, \(h\) is the height of the object, \(v\) is the distance of the image from the lens/mirror, and \(u\) is the distance of the object from the lens/mirror.

2. **Analyzing Positive Magnification**:
A positive magnification indicates that the image is upright relative to the object. This means that the height of the image is in the same direction as the height of the object.

3. **Greater than Unity**:
When magnification is greater than unity (m > 1), it implies that the height of the image is greater than the height of the object. This means that the image is larger than the object.

4. **Types of Images**:
- A real image is formed when light rays converge and can be projected on a screen. Real images are typically inverted.
- A virtual image is formed when light rays appear to diverge from a point. Virtual images cannot be projected on a screen and are typically upright.

5. **Conclusion**:
Since we have a positive magnification greater than unity, it indicates that the image is not only upright but also larger than the object. This scenario typically occurs with virtual images formed by concave mirrors or converging lenses when the object is placed within the focal length.

### Final Answer:
A positive magnification greater than unity indicates a **virtual image**.

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