Electromagnetic waves are transverse in nature is evident by :

Question

Accepted Answer

Electromagnetic waves are transverse in nature, and this is most clearly demonstrated by the phenomenon of polarization. Here's a detailed explanation of why Option 2 is correct and why the other options are not:

1. **Polarization (Correct Answer: Option 2):**
   - Polarization is the process by which the oscillations of electromagnetic waves are restricted to a single plane. This phenomenon can only occur if the waves are transverse, meaning that their oscillations are perpendicular to the direction of wave propagation. In the case of electromagnetic waves, the electric and magnetic fields oscillate perpendicular to each other and to the direction of wave travel. Polarization is a definitive proof of the transverse nature of electromagnetic waves because only transverse waves can be polarized. Longitudinal waves, such as sound waves in air, cannot be polarized because their oscillations occur in the direction of wave propagation.

2. **Reflection (Option 1):**
   - Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. While reflection occurs with both transverse and longitudinal waves, it does not specifically demonstrate the transverse nature of electromagnetic waves. Reflection is a general wave phenomenon and does not provide evidence of the wave's transverse characteristics.

3. **Interference (Option 3):**
   - Interference is the phenomenon where two or more waves superpose to form a resultant wave of greater, lower, or the same amplitude. Like reflection, interference can occur with both transverse and longitudinal waves. It is a property of wave behavior in general and does not specifically indicate whether a wave is transverse or longitudinal. Therefore, interference does not provide evidence of the transverse nature of electromagnetic waves.

4. **Diffraction (Option 4):**
   - Diffraction is the bending of waves around obstacles and the spreading out of waves past small openings. This phenomenon is also common to both transverse and longitudinal waves. Diffraction demonstrates the wave nature of electromagnetic waves but does not specifically indicate their transverse nature. It is a general property of waves and does not provide direct evidence of the transverse nature of electromagnetic waves.

In conclusion, polarization is the only phenomenon among the options that directly demonstrates the transverse nature of electromagnetic waves, making Option 2 the correct answer.