The image of the right hand in a plane mirror looks like that of a left hand.

Answer

To understand why the image of the right hand in a plane mirror looks like that of a left hand, we can break it down into a few steps:

### Step-by-Step Solution:

1. **Understanding Plane Mirrors**: A plane mirror is a flat, smooth surface that reflects light. When light rays hit the mirror, they bounce back, creating an image.

2. **Characteristics of the Image**: The image formed by a plane mirror has three main characteristics:
- It is virtual, meaning it cannot be projected on a screen.
- It is erect, meaning it appears upright.
- It is of the same size as the object.

3. **Reflection Process**: When you place your right hand in front of a plane mirror, the light rays from your hand hit the mirror and reflect back. The reflection occurs at the same angle at which the light rays hit the mirror.

4. **Lateral Inversion**: One key concept in mirror reflection is lateral inversion. This means that the left and right sides are switched in the image. So, when you raise your right hand, the image in the mirror appears to raise its left hand.

5. **Conclusion**: Therefore, the image of your right hand in the mirror looks like your left hand due to the lateral inversion effect caused by the plane mirror.

### Final Answer:
The image of the right hand in a plane mirror looks like that of a left hand because of the lateral inversion that occurs during reflection in a plane mirror.

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