Name the phenomenon responsible for the following effect :
When we sit in front of a plane mirror and write with our right hand, it appears in the mirror that we are writing with the left hand.

Options

A. Reflection
B. Lateral inversion
C. Refraction
D. Polarisation

Answer

To answer the question regarding the phenomenon responsible for the effect observed when we sit in front of a plane mirror and write with our right hand, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Setup**:
- When you sit in front of a plane mirror, you are facing the mirror directly. Your right hand is used to write.

2. **Observing the Reflection**:
- In the mirror, the reflection of your right hand appears as if it is the left hand. This is because the mirror reverses the image laterally.

3. **Identifying the Phenomenon**:
- The specific phenomenon that causes this effect is known as **lateral inversion**.

4. **Explaining Lateral Inversion**:
- Lateral inversion means that the left and right sides of the object are switched in the mirror image. For example, if you write the letter 'C' with your right hand, in the mirror, it appears as if you wrote it with your left hand.

5. **Conclusion**:
- Therefore, the phenomenon responsible for the effect observed when writing in front of a mirror is called **lateral inversion**.