A virtual image is one which

Options

A. can he taken on a screen
B. cannot be taken on a screen
C. sometimes can be and sometimes cannot be taken on a screen
D. is formed only by a concave mirror

Answer

### Step-by-Step Text Solution:

1. **Understanding Virtual Images**: A virtual image is formed when light rays appear to diverge from a point, but they do not actually converge at that point. This means that the rays of light seem to come from a location where no actual light is present.

2. **Analyzing the Statements**:
- **Statement 1**: "Can be taken on a screen."
- This statement is incorrect because virtual images cannot be projected onto a screen. Real images can be projected onto a screen as they are formed by converging light rays.

- **Statement 2**: "Cannot be taken on a screen."
- This statement is correct. Virtual images cannot be captured on a screen because they are not formed by actual light rays converging at a point.

- **Statement 3**: "Sometimes can be and sometimes cannot be."
- This statement is incorrect. Virtual images are always unable to be projected onto a screen.

- **Statement 4**: "It is formed only by a concave mirror."
- This statement is also incorrect. Virtual images can be formed by both concave mirrors and convex mirrors.

3. **Conclusion**: The correct statement regarding virtual images is that they "cannot be taken on a screen."