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QPage 338: Q6: HC Verma: Concepts of Physics - Volume 2 Electromagnetic Waves Page 338: Q6 Solution: Can an electromagnetic wave be polarised?

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often assume that both the electric and magnetic fields must be independently oriented to define polarisation, or that polarisation refers to the wave’s propagation direction. In reality, polarisation describes the fixed orientation of the electric‑field vector (the magnetic field follows automatically as a perpendicular companion).

Can an electromagnetic wave be polarised?

Step-by-Step Verified Solution

**Answer:** Yes, an electromagnetic wave can be polarised. **Step-by-Step Explanation:** Electromagnetic waves are transverse waves; the electric and magnetic field vectors oscillate perpendicular to the direction of propagation. Polarisation refers to the orientation of these oscillations. Since the electric field vector can have a specific direction, electromagnetic waves can be polarised [citation:1].

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