Shaving mirrors are

Options

A. convex mirrors
B. concave mirrors
C. plane mirrors
D. none of these

Answer

### Step-by-Step Solution:

1. **Understanding the Purpose of Shaving Mirrors**:
- Shaving mirrors are designed to provide an enlarged and erect image of the face. This helps individuals see their face clearly for shaving purposes.

2. **Identifying the Types of Mirrors**:
- The question asks whether shaving mirrors are convex, concave, or plane mirrors. We will analyze each type to determine which one meets the requirements.

3. **Analyzing Convex Mirrors**:
- A convex mirror diverges light rays. When you stand in front of a convex mirror, the rays coming from your face spread out after reflecting off the mirror.
- The image formed by a convex mirror is always smaller than the actual object (diminished) and is erect. Therefore, while the image is upright, it does not meet the requirement of being enlarged.

4. **Analyzing Concave Mirrors**:
- A concave mirror converges light rays. When you position your face close to the mirror (between the focal point and the center of curvature), the rays reflect and converge to form an image.
- The image formed in this case is enlarged and erect, fulfilling both requirements for a shaving mirror.

5. **Analyzing Plane Mirrors**:
- A plane mirror also produces an erect image, but the size of the image is the same as the actual object. Therefore, it does not provide the enlargement needed for shaving.

6. **Conclusion**:
- Based on the analysis, the only type of mirror that meets both criteria (enlarged and erect image) is the concave mirror. Thus, shaving mirrors are concave mirrors.

### Final Answer:
Shaving mirrors are concave mirrors.

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