An image that cannot be obtained on a screen is called _____ .

Options

A. Real
B. Virtual
C. Erect
D. Inverted

Explanation

**Step-by-Step Solution:**

1. **Understanding Image Formation**: In optics, images can be classified into two main types: real images and virtual images. Real images can be projected onto a screen, while virtual images cannot.

2. **Definition of Virtual Image**: A virtual image is formed when the light rays appear to diverge from a point, but do not actually converge at that point. This means that the light rays do not meet in reality.

3. **Example of Virtual Image**: A common example of a virtual image is the one formed by a concave mirror when an object is placed between the mirror and its focus. In this case, the light rays reflecting off the mirror appear to come from a point behind the mirror.

4. **Characteristics of Virtual Images**:
- They cannot be captured on a screen.
- They are usually upright (not inverted).
- They can be seen by looking into the mirror.

5. **Conclusion**: Therefore, the answer to the question "An image that cannot be obtained on a screen is called _____" is **virtual image**.

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