Name the phenomenon which justifies the transverse nature of em waves.

Explanation

**Step-by-Step Solution:**

1. **Understanding Transverse Waves**:
- Transverse waves are characterized by vibrations that occur perpendicular to the direction of wave propagation. In the case of electromagnetic (EM) waves, the electric field and magnetic field oscillate perpendicular to each other and also perpendicular to the direction of wave travel.

2. **Identifying the Phenomenon**:
- The phenomenon that justifies the transverse nature of electromagnetic waves is **polarization**.

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