Electromagnetic Waves
Electromagnetic Waves is an important and scoring chapter in JEE Main Physics.
It explains the origin, properties, production, and applications of electromagnetic waves.
This chapter connects electricity, magnetism, and wave optics concepts and is highly formula-oriented.
Topics Covered
- Displacement Current
- Maxwell’s Concept of Electromagnetic Waves
- Characteristics of Electromagnetic Waves
- Speed of Electromagnetic Waves
- Electric and Magnetic Field Relationship
- Electromagnetic Spectrum
- Radio Waves
- Microwaves
- Infrared Waves
- Visible Light
- Ultraviolet Rays
- X-rays
- Gamma Rays
Important Formulas
Speed of Electromagnetic Waves:
c = 1 / √(μ0ε0)
Wave Relation:
c = νλ
Electric and Magnetic Field Relation:
E = cB
Energy of Photon:
E = hν
JEE Main Preparation Tips
- Memorize the electromagnetic spectrum in correct order.
- Understand applications of different electromagnetic waves.
- Practice direct formula-based numerical questions.
- Focus on wave properties and field relationships.
- Solve previous year JEE Main questions for confidence.
