Electromagnetic waves are transverse in nature is evident by:
Correct answer: A. Polarization
- A. Polarization
- B. Interference
- C. Reflection
- D. Diffraction
Explanation
Only transverse waves can be polarized. Longitudinal waves cannot be polarized. The reason behind this is that the transverse waves can vibrate in all directions perpendicular to the direction of propagation. It is therefore feasible to continue the vibration to a single plane. On the other hand, longitudinal waves have vibrations along a single line only, and it is therefore not feasible to confine them to a single plane.
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About Alternating Current
Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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